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Packagehl7.fhir.uv.xver-r4.r3
Resource TypeStructureDefinition
IdStructureDefinition-ext-R4-SubstanceSpecification.structure.json
FHIR VersionR3
Sourcehttp://hl7.org/fhir/uv/xver-r4.r3/0.1.0/StructureDefinition-ext-R4-SubstanceSpecification.structure.html
URLhttp://hl7.org/fhir/4.0/StructureDefinition/extension-SubstanceSpecification.structure
Version0.1.0
Statusactive
Date2026-03-17T21:02:03.8104715+00:00
NameExtensionSubstanceSpecification_Structure
TitleR4: Structural information (new)
Realmuv
Authorityhl7
DescriptionR4: `SubstanceSpecification.structure` (new:BackboneElement)
PurposeThis extension is part of the cross-version definitions generated to enable use of the element `SubstanceSpecification.structure` as defined in FHIR R4 in FHIR STU3. The source element is defined as: `SubstanceSpecification.structure` 0..1 `BackboneElement` Following are the generation technical comments: Element `SubstanceSpecification.structure` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped. Element `SubstanceSpecification.structure` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).
TypeExtension
Kindcomplex-type

Resources that use this resource

ConceptMap
hl7.fhir.uv.xver-r4.r3#0.1.0R4-SubstanceSpecification-element-map-to-R3Cross-version mapping for FHIR R4 SubstanceSpecification to FHIR STU3 Basic
StructureDefinition
hl7.fhir.uv.xver-r4.r3#0.1.0profile-SubstanceSpecificationCross-version Profile for R4.SubstanceSpecification for use in FHIR STU3

Resources that this resource uses

StructureDefinition
hl7.fhir.uv.xver-r4.r4b#0.1.0profile-DocumentReferenceCross-version Profile for R4.DocumentReference for use in FHIR R4B

Examples of Use for Extension

No extension usage examples found


Narrative

Note: links and images are rebased to the (stated) source

Generated Narrative: StructureDefinition ext-R4-SubstanceSpecification.structure

NameFlagsCard.TypeDescription & Constraintsdoco
.. Extension 0..1ExtensionR4: Structural information (new)
... Slices for extension 0..*ExtensionExtension
Slice: Unordered, Open by value:url
.... extension:stereochemistry 0..1ExtensionR4: Stereochemistry type (new)
..... url 1..1uri"stereochemistry"
..... value[x] 0..1CodeableConceptStereochemistry type
.... extension:opticalActivity 0..1ExtensionR4: Optical activity type (new)
..... url 1..1uri"opticalActivity"
..... value[x] 0..1CodeableConceptOptical activity type
.... extension:molecularFormula 0..1ExtensionR4: Molecular formula (new)
..... url 1..1uri"molecularFormula"
..... value[x] 0..1stringMolecular formula
.... extension:molecularFormulaByMoiety 0..1ExtensionR4: Specified per moiety according to the Hill system, i.e. first C, then H, then alphabetical, each moiety separated by a dot (new)
..... url 1..1uri"molecularFormulaByMoiety"
..... value[x] 0..1stringSpecified per moiety according to the Hill system, i.e. first C, then H, then alphabetical, each moiety separated by a dot
.... extension:isotope 0..*ExtensionR4: Applicable for single substances that contain a radionuclide or a non-natural isotopic ratio (new)
..... Slices for extension 0..*ExtensionExtension
Slice: Unordered, Open by value:url
...... extension:identifier 0..1ExtensionR4: Substance identifier for each non-natural or radioisotope (new)
....... url 1..1uri"identifier"
....... value[x] 0..1IdentifierSubstance identifier for each non-natural or radioisotope
...... extension:name 0..1ExtensionR4: Substance name for each non-natural or radioisotope (new)
....... url 1..1uri"name"
....... value[x] 0..1CodeableConceptSubstance name for each non-natural or radioisotope
...... extension:substitution 0..1ExtensionR4: The type of isotopic substitution present in a single substance (new)
....... url 1..1uri"substitution"
....... value[x] 0..1CodeableConceptThe type of isotopic substitution present in a single substance
...... extension:halfLife 0..1ExtensionR4: Half life - for a non-natural nuclide (new)
....... url 1..1uri"halfLife"
....... value[x] 0..1QuantityHalf life - for a non-natural nuclide
...... extension:molecularWeight 0..1ExtensionR4: The molecular weight or weight range (for proteins, polymers or nucleic acids) (new)
....... Slices for extension 0..*ExtensionExtension
Slice: Unordered, Open by value:url
........ extension:method 0..1ExtensionR4: The method by which the molecular weight was determined (new)
......... url 1..1uri"method"
......... value[x] 0..1CodeableConceptThe method by which the molecular weight was determined
........ extension:type 0..1ExtensionR4: Type of molecular weight such as exact, average (also known as. number average), weight average (new)
......... url 1..1uri"type"
......... value[x] 0..1CodeableConceptType of molecular weight such as exact, average (also known as. number average), weight average
........ extension:amount 0..1ExtensionR4: Used to capture quantitative values for a variety of elements. If only limits are given, the arithmetic mean would be the average. If only a single definite value for a given element is given, it would be captured in this field (new)
......... url 1..1uri"amount"
......... value[x] 0..1QuantityUsed to capture quantitative values for a variety of elements. If only limits are given, the arithmetic mean would be the average. If only a single definite value for a given element is given, it would be captured in this field
....... url 1..1uri"molecularWeight"
....... value[x] 0..0Value of extension
..... url 1..1uri"isotope"
..... value[x] 0..0Value of extension
.... extension:molecularWeight 0..1ExtensionR4: The molecular weight or weight range (for proteins, polymers or nucleic acids) (new)
..... url 1..1uri"http://hl7.org/fhir/4.0/StructureDefinition/extension-SubstanceSpecification.structure.isotope.molecularWeight"
..... value[x] 0..0Value of extension
.... extension:source 0..*ExtensionR4: Supporting literature (new)
..... url 1..1uri"source"
..... value[x] 0..1Reference(Cross-version Profile for R4.DocumentReference for use in FHIR STU3(0.1.0) | DocumentReference)Supporting literature
.... extension:representation 0..*ExtensionR4: Molecular structural representation (new)
..... Slices for extension 0..*ExtensionExtension
Slice: Unordered, Open by value:url
...... extension:type 0..1ExtensionR4: The type of structure (e.g. Full, Partial, Representative) (new)
....... url 1..1uri"type"
....... value[x] 0..1CodeableConceptThe type of structure (e.g. Full, Partial, Representative)
...... extension:representation 0..1ExtensionR4: The structural representation as text string in a format e.g. InChI, SMILES, MOLFILE, CDX (new)
....... url 1..1uri"representation"
....... value[x] 0..1stringThe structural representation as text string in a format e.g. InChI, SMILES, MOLFILE, CDX
...... extension:attachment 0..1ExtensionR4: An attached file with the structural representation (new)
....... url 1..1uri"attachment"
....... value[x] 0..1AttachmentAn attached file with the structural representation
..... url 1..1uri"representation"
..... value[x] 0..0Value of extension
... url 1..1uri"http://hl7.org/fhir/4.0/StructureDefinition/extension-SubstanceSpecification.structure"
... value[x] 0..0Value of extension

doco Documentation for this format

Source1

{
  "resourceType": "StructureDefinition",
  "id": "ext-R4-SubstanceSpecification.structure",
  "text": {
    "status": "extensions",
    "div": "<!-- snip (see above) -->"
  },
  "extension": [
    {
      "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
      "valueCode": "fhir"
    },
    {
      "extension": [
        {
          "url": "packageId",
          "valueId": "hl7.fhir.uv.xver-r4.r3"
        },
        {
          "url": "version",
          "valueString": "0.1.0"
        },
        {
          "url": "uri",
          "valueUri": "http://hl7.org/fhir/uv/xver/ImplementationGuide/hl7.fhir.uv.xver-r4.r3"
        }
      ],
      "url": "http://hl7.org/fhir/StructureDefinition/package-source"
    },
    {
      "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
      "valueInteger": 0,
      "_valueInteger": {
        "extension": [
          {
            "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-conformance-derivedFrom",
            "valueUri": "http://hl7.org/fhir/uv/xver/ImplementationGuide/hl7.fhir.uv.xver-r4.r3"
          }
        ]
      }
    },
    {
      "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status",
      "valueCode": "trial-use",
      "_valueCode": {
        "extension": [
          {
            "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-conformance-derivedFrom",
            "valueUri": "http://hl7.org/fhir/uv/xver/ImplementationGuide/hl7.fhir.uv.xver-r4.r3"
          }
        ]
      }
    }
  ],
  "url": "http://hl7.org/fhir/4.0/StructureDefinition/extension-SubstanceSpecification.structure",
  "version": "0.1.0",
  "name": "ExtensionSubstanceSpecification_Structure",
  "title": "R4: Structural information (new)",
  "status": "active",
  "experimental": false,
  "date": "2026-03-17T21:02:03.8104715+00:00",
  "publisher": "FHIR Infrastructure",
  "contact": [
    {
      "name": "FHIR Infrastructure",
      "telecom": [
        {
          "system": "url",
          "value": "http://www.hl7.org/Special/committees/fiwg"
        }
      ]
    }
  ],
  "description": "R4: `SubstanceSpecification.structure` (new:BackboneElement)",
  "jurisdiction": [
    {
      "coding": [
        {
          "system": "http://unstats.un.org/unsd/methods/m49/m49.htm",
          "code": "001",
          "display": "World"
        }
      ]
    }
  ],
  "purpose": "This extension is part of the cross-version definitions generated to enable use of the\r\nelement `SubstanceSpecification.structure` as defined in FHIR R4\r\nin FHIR STU3.\r\n\r\nThe source element is defined as:\r\n`SubstanceSpecification.structure` 0..1 `BackboneElement`\r\n\r\nFollowing are the generation technical comments:\r\nElement `SubstanceSpecification.structure` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
  "fhirVersion": "3.0.2",
  "mapping": [
    {
      "identity": "rim",
      "uri": "http://hl7.org/v3",
      "name": "RIM Mapping"
    }
  ],
  "kind": "complex-type",
  "abstract": false,
  "contextType": "resource",
  "context": [
    "Basic"
  ],
  "type": "Extension",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Extension",
  "derivation": "constraint",
  "snapshot": {
    "element": [
      {
        "id": "Extension",
        "path": "Extension",
        "short": "R4: Structural information (new)",
        "definition": "R4: `SubstanceSpecification.structure` (new:BackboneElement)",
        "comment": "Element `SubstanceSpecification.structure` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension",
          "min": 0,
          "max": "*"
        },
        "condition": [
          "ele-1"
        ],
        "constraint": [
          {
            "key": "ele-1",
            "severity": "error",
            "human": "All FHIR elements must have a @value or children",
            "expression": "hasValue() | (children().count() > id.count())",
            "xpath": "@value|f:*|h:div",
            "source": "http://hl7.org/fhir/StructureDefinition/Element"
          },
          {
            "key": "ext-1",
            "severity": "error",
            "human": "Must have either extensions or value[x], not both",
            "expression": "extension.exists() != value.exists()",
            "xpath": "exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])",
            "source": "http://hl7.org/fhir/StructureDefinition/Extension"
          }
        ],
        "isModifier": false
      },
      {
        "id": "Extension.id",
        "path": "Extension.id",
        "representation": [
          "xmlAttr"
        ],
        "short": "xml:id (or equivalent in JSON)",
        "definition": "unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.id",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "string"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension",
        "path": "Extension.extension",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "url"
            }
          ],
          "description": "Extensions are always sliced by (at least) url",
          "ordered": false,
          "rules": "open"
        },
        "short": "Extension",
        "definition": "An Extension",
        "min": 0,
        "max": "*",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ]
      },
      {
        "id": "Extension.extension:stereochemistry",
        "path": "Extension.extension",
        "sliceName": "stereochemistry",
        "short": "R4: Stereochemistry type (new)",
        "definition": "R4: `SubstanceSpecification.structure.stereochemistry` (new:CodeableConcept)",
        "comment": "Element `SubstanceSpecification.structure.stereochemistry` is part of an existing definition because parent element `SubstanceSpecification.structure` requires a cross-version extension.\nElement `SubstanceSpecification.structure.stereochemistry` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.stereochemistry` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "requirements": "Element `SubstanceSpecification.structure.stereochemistry` is part of an existing definition because parent element `SubstanceSpecification.structure` requires a cross-version extension.\nElement `SubstanceSpecification.structure.stereochemistry` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.stereochemistry` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ]
      },
      {
        "id": "Extension.extension:stereochemistry.id",
        "path": "Extension.extension.id",
        "representation": [
          "xmlAttr"
        ],
        "short": "xml:id (or equivalent in JSON)",
        "definition": "unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.id",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "string"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension:stereochemistry.extension",
        "path": "Extension.extension.extension",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "url"
            }
          ],
          "description": "Extensions are always sliced by (at least) url",
          "rules": "open"
        },
        "short": "Additional Content defined by implementations",
        "definition": "May be used to represent additional information that is not part of the basic definition of the element. In order to make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.",
        "comment": "There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.",
        "alias": [
          "extensions",
          "user content"
        ],
        "min": 0,
        "max": "*",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension:stereochemistry.url",
        "path": "Extension.extension.url",
        "representation": [
          "xmlAttr"
        ],
        "short": "identifies the meaning of the extension",
        "definition": "Source of the definition for the extension code - a logical name or a URL.",
        "comment": "The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "type": [
          {
            "code": "uri"
          }
        ],
        "fixedUri": "stereochemistry",
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.extension:stereochemistry.value[x]",
        "path": "Extension.extension.value[x]",
        "short": "Stereochemistry type",
        "definition": "Stereochemistry type.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "CodeableConcept"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.extension:opticalActivity",
        "path": "Extension.extension",
        "sliceName": "opticalActivity",
        "short": "R4: Optical activity type (new)",
        "definition": "R4: `SubstanceSpecification.structure.opticalActivity` (new:CodeableConcept)",
        "comment": "Element `SubstanceSpecification.structure.opticalActivity` is part of an existing definition because parent element `SubstanceSpecification.structure` requires a cross-version extension.\nElement `SubstanceSpecification.structure.opticalActivity` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.opticalActivity` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "requirements": "Element `SubstanceSpecification.structure.opticalActivity` is part of an existing definition because parent element `SubstanceSpecification.structure` requires a cross-version extension.\nElement `SubstanceSpecification.structure.opticalActivity` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.opticalActivity` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ]
      },
      {
        "id": "Extension.extension:opticalActivity.id",
        "path": "Extension.extension.id",
        "representation": [
          "xmlAttr"
        ],
        "short": "xml:id (or equivalent in JSON)",
        "definition": "unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.id",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "string"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension:opticalActivity.extension",
        "path": "Extension.extension.extension",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "url"
            }
          ],
          "description": "Extensions are always sliced by (at least) url",
          "rules": "open"
        },
        "short": "Additional Content defined by implementations",
        "definition": "May be used to represent additional information that is not part of the basic definition of the element. In order to make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.",
        "comment": "There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.",
        "alias": [
          "extensions",
          "user content"
        ],
        "min": 0,
        "max": "*",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension:opticalActivity.url",
        "path": "Extension.extension.url",
        "representation": [
          "xmlAttr"
        ],
        "short": "identifies the meaning of the extension",
        "definition": "Source of the definition for the extension code - a logical name or a URL.",
        "comment": "The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "type": [
          {
            "code": "uri"
          }
        ],
        "fixedUri": "opticalActivity",
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.extension:opticalActivity.value[x]",
        "path": "Extension.extension.value[x]",
        "short": "Optical activity type",
        "definition": "Optical activity type.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "CodeableConcept"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.extension:molecularFormula",
        "path": "Extension.extension",
        "sliceName": "molecularFormula",
        "short": "R4: Molecular formula (new)",
        "definition": "R4: `SubstanceSpecification.structure.molecularFormula` (new:string)",
        "comment": "Element `SubstanceSpecification.structure.molecularFormula` is part of an existing definition because parent element `SubstanceSpecification.structure` requires a cross-version extension.\nElement `SubstanceSpecification.structure.molecularFormula` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.molecularFormula` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "requirements": "Element `SubstanceSpecification.structure.molecularFormula` is part of an existing definition because parent element `SubstanceSpecification.structure` requires a cross-version extension.\nElement `SubstanceSpecification.structure.molecularFormula` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.molecularFormula` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ]
      },
      {
        "id": "Extension.extension:molecularFormula.id",
        "path": "Extension.extension.id",
        "representation": [
          "xmlAttr"
        ],
        "short": "xml:id (or equivalent in JSON)",
        "definition": "unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.id",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "string"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension:molecularFormula.extension",
        "path": "Extension.extension.extension",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "url"
            }
          ],
          "description": "Extensions are always sliced by (at least) url",
          "rules": "open"
        },
        "short": "Additional Content defined by implementations",
        "definition": "May be used to represent additional information that is not part of the basic definition of the element. In order to make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.",
        "comment": "There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.",
        "alias": [
          "extensions",
          "user content"
        ],
        "min": 0,
        "max": "*",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension:molecularFormula.url",
        "path": "Extension.extension.url",
        "representation": [
          "xmlAttr"
        ],
        "short": "identifies the meaning of the extension",
        "definition": "Source of the definition for the extension code - a logical name or a URL.",
        "comment": "The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "type": [
          {
            "code": "uri"
          }
        ],
        "fixedUri": "molecularFormula",
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.extension:molecularFormula.value[x]",
        "path": "Extension.extension.value[x]",
        "short": "Molecular formula",
        "definition": "Molecular formula.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "string"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.extension:molecularFormulaByMoiety",
        "path": "Extension.extension",
        "sliceName": "molecularFormulaByMoiety",
        "short": "R4: Specified per moiety according to the Hill system, i.e. first C, then H, then alphabetical, each moiety separated by a dot (new)",
        "definition": "R4: `SubstanceSpecification.structure.molecularFormulaByMoiety` (new:string)",
        "comment": "Element `SubstanceSpecification.structure.molecularFormulaByMoiety` is part of an existing definition because parent element `SubstanceSpecification.structure` requires a cross-version extension.\nElement `SubstanceSpecification.structure.molecularFormulaByMoiety` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.molecularFormulaByMoiety` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "requirements": "Element `SubstanceSpecification.structure.molecularFormulaByMoiety` is part of an existing definition because parent element `SubstanceSpecification.structure` requires a cross-version extension.\nElement `SubstanceSpecification.structure.molecularFormulaByMoiety` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.molecularFormulaByMoiety` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ]
      },
      {
        "id": "Extension.extension:molecularFormulaByMoiety.id",
        "path": "Extension.extension.id",
        "representation": [
          "xmlAttr"
        ],
        "short": "xml:id (or equivalent in JSON)",
        "definition": "unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.id",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "string"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension:molecularFormulaByMoiety.extension",
        "path": "Extension.extension.extension",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "url"
            }
          ],
          "description": "Extensions are always sliced by (at least) url",
          "rules": "open"
        },
        "short": "Additional Content defined by implementations",
        "definition": "May be used to represent additional information that is not part of the basic definition of the element. In order to make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.",
        "comment": "There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.",
        "alias": [
          "extensions",
          "user content"
        ],
        "min": 0,
        "max": "*",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension:molecularFormulaByMoiety.url",
        "path": "Extension.extension.url",
        "representation": [
          "xmlAttr"
        ],
        "short": "identifies the meaning of the extension",
        "definition": "Source of the definition for the extension code - a logical name or a URL.",
        "comment": "The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "type": [
          {
            "code": "uri"
          }
        ],
        "fixedUri": "molecularFormulaByMoiety",
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.extension:molecularFormulaByMoiety.value[x]",
        "path": "Extension.extension.value[x]",
        "short": "Specified per moiety according to the Hill system, i.e. first C, then H, then alphabetical, each moiety separated by a dot",
        "definition": "Specified per moiety according to the Hill system, i.e. first C, then H, then alphabetical, each moiety separated by a dot.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "string"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope",
        "path": "Extension.extension",
        "sliceName": "isotope",
        "short": "R4: Applicable for single substances that contain a radionuclide or a non-natural isotopic ratio (new)",
        "definition": "R4: `SubstanceSpecification.structure.isotope` (new:BackboneElement)",
        "comment": "Element `SubstanceSpecification.structure.isotope` is part of an existing definition because parent element `SubstanceSpecification.structure` requires a cross-version extension.\nElement `SubstanceSpecification.structure.isotope` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.isotope` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "requirements": "Element `SubstanceSpecification.structure.isotope` is part of an existing definition because parent element `SubstanceSpecification.structure` requires a cross-version extension.\nElement `SubstanceSpecification.structure.isotope` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.isotope` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "min": 0,
        "max": "*",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.id",
        "path": "Extension.extension.id",
        "representation": [
          "xmlAttr"
        ],
        "short": "xml:id (or equivalent in JSON)",
        "definition": "unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.id",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "string"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension",
        "path": "Extension.extension.extension",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "url"
            }
          ],
          "description": "Extensions are always sliced by (at least) url",
          "ordered": false,
          "rules": "open"
        },
        "short": "Extension",
        "definition": "An Extension",
        "min": 0,
        "max": "*",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:identifier",
        "path": "Extension.extension.extension",
        "sliceName": "identifier",
        "short": "R4: Substance identifier for each non-natural or radioisotope (new)",
        "definition": "R4: `SubstanceSpecification.structure.isotope.identifier` (new:Identifier)",
        "comment": "Element `SubstanceSpecification.structure.isotope.identifier` is part of an existing definition because parent element `SubstanceSpecification.structure.isotope` requires a cross-version extension.\nElement `SubstanceSpecification.structure.isotope.identifier` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.isotope.identifier` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "requirements": "Element `SubstanceSpecification.structure.isotope.identifier` is part of an existing definition because parent element `SubstanceSpecification.structure.isotope` requires a cross-version extension.\nElement `SubstanceSpecification.structure.isotope.identifier` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.isotope.identifier` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:identifier.id",
        "path": "Extension.extension.extension.id",
        "representation": [
          "xmlAttr"
        ],
        "short": "xml:id (or equivalent in JSON)",
        "definition": "unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.id",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "string"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:identifier.extension",
        "path": "Extension.extension.extension.extension",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "url"
            }
          ],
          "description": "Extensions are always sliced by (at least) url",
          "rules": "open"
        },
        "short": "Additional Content defined by implementations",
        "definition": "May be used to represent additional information that is not part of the basic definition of the element. In order to make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.",
        "comment": "There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.",
        "alias": [
          "extensions",
          "user content"
        ],
        "min": 0,
        "max": "*",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:identifier.url",
        "path": "Extension.extension.extension.url",
        "representation": [
          "xmlAttr"
        ],
        "short": "identifies the meaning of the extension",
        "definition": "Source of the definition for the extension code - a logical name or a URL.",
        "comment": "The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "type": [
          {
            "code": "uri"
          }
        ],
        "fixedUri": "identifier",
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:identifier.value[x]",
        "path": "Extension.extension.extension.value[x]",
        "short": "Substance identifier for each non-natural or radioisotope",
        "definition": "Substance identifier for each non-natural or radioisotope.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "Identifier"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:name",
        "path": "Extension.extension.extension",
        "sliceName": "name",
        "short": "R4: Substance name for each non-natural or radioisotope (new)",
        "definition": "R4: `SubstanceSpecification.structure.isotope.name` (new:CodeableConcept)",
        "comment": "Element `SubstanceSpecification.structure.isotope.name` is part of an existing definition because parent element `SubstanceSpecification.structure.isotope` requires a cross-version extension.\nElement `SubstanceSpecification.structure.isotope.name` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.isotope.name` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "requirements": "Element `SubstanceSpecification.structure.isotope.name` is part of an existing definition because parent element `SubstanceSpecification.structure.isotope` requires a cross-version extension.\nElement `SubstanceSpecification.structure.isotope.name` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.isotope.name` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:name.id",
        "path": "Extension.extension.extension.id",
        "representation": [
          "xmlAttr"
        ],
        "short": "xml:id (or equivalent in JSON)",
        "definition": "unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.id",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "string"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:name.extension",
        "path": "Extension.extension.extension.extension",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "url"
            }
          ],
          "description": "Extensions are always sliced by (at least) url",
          "rules": "open"
        },
        "short": "Additional Content defined by implementations",
        "definition": "May be used to represent additional information that is not part of the basic definition of the element. In order to make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.",
        "comment": "There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.",
        "alias": [
          "extensions",
          "user content"
        ],
        "min": 0,
        "max": "*",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:name.url",
        "path": "Extension.extension.extension.url",
        "representation": [
          "xmlAttr"
        ],
        "short": "identifies the meaning of the extension",
        "definition": "Source of the definition for the extension code - a logical name or a URL.",
        "comment": "The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "type": [
          {
            "code": "uri"
          }
        ],
        "fixedUri": "name",
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:name.value[x]",
        "path": "Extension.extension.extension.value[x]",
        "short": "Substance name for each non-natural or radioisotope",
        "definition": "Substance name for each non-natural or radioisotope.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "CodeableConcept"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:substitution",
        "path": "Extension.extension.extension",
        "sliceName": "substitution",
        "short": "R4: The type of isotopic substitution present in a single substance (new)",
        "definition": "R4: `SubstanceSpecification.structure.isotope.substitution` (new:CodeableConcept)",
        "comment": "Element `SubstanceSpecification.structure.isotope.substitution` is part of an existing definition because parent element `SubstanceSpecification.structure.isotope` requires a cross-version extension.\nElement `SubstanceSpecification.structure.isotope.substitution` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.isotope.substitution` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "requirements": "Element `SubstanceSpecification.structure.isotope.substitution` is part of an existing definition because parent element `SubstanceSpecification.structure.isotope` requires a cross-version extension.\nElement `SubstanceSpecification.structure.isotope.substitution` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.isotope.substitution` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:substitution.id",
        "path": "Extension.extension.extension.id",
        "representation": [
          "xmlAttr"
        ],
        "short": "xml:id (or equivalent in JSON)",
        "definition": "unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.id",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "string"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:substitution.extension",
        "path": "Extension.extension.extension.extension",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "url"
            }
          ],
          "description": "Extensions are always sliced by (at least) url",
          "rules": "open"
        },
        "short": "Additional Content defined by implementations",
        "definition": "May be used to represent additional information that is not part of the basic definition of the element. In order to make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.",
        "comment": "There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.",
        "alias": [
          "extensions",
          "user content"
        ],
        "min": 0,
        "max": "*",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:substitution.url",
        "path": "Extension.extension.extension.url",
        "representation": [
          "xmlAttr"
        ],
        "short": "identifies the meaning of the extension",
        "definition": "Source of the definition for the extension code - a logical name or a URL.",
        "comment": "The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "type": [
          {
            "code": "uri"
          }
        ],
        "fixedUri": "substitution",
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:substitution.value[x]",
        "path": "Extension.extension.extension.value[x]",
        "short": "The type of isotopic substitution present in a single substance",
        "definition": "The type of isotopic substitution present in a single substance.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "CodeableConcept"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:halfLife",
        "path": "Extension.extension.extension",
        "sliceName": "halfLife",
        "short": "R4: Half life - for a non-natural nuclide (new)",
        "definition": "R4: `SubstanceSpecification.structure.isotope.halfLife` (new:Quantity)",
        "comment": "Element `SubstanceSpecification.structure.isotope.halfLife` is part of an existing definition because parent element `SubstanceSpecification.structure.isotope` requires a cross-version extension.\nElement `SubstanceSpecification.structure.isotope.halfLife` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.isotope.halfLife` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "requirements": "Element `SubstanceSpecification.structure.isotope.halfLife` is part of an existing definition because parent element `SubstanceSpecification.structure.isotope` requires a cross-version extension.\nElement `SubstanceSpecification.structure.isotope.halfLife` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.isotope.halfLife` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:halfLife.id",
        "path": "Extension.extension.extension.id",
        "representation": [
          "xmlAttr"
        ],
        "short": "xml:id (or equivalent in JSON)",
        "definition": "unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.id",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "string"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:halfLife.extension",
        "path": "Extension.extension.extension.extension",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "url"
            }
          ],
          "description": "Extensions are always sliced by (at least) url",
          "rules": "open"
        },
        "short": "Additional Content defined by implementations",
        "definition": "May be used to represent additional information that is not part of the basic definition of the element. In order to make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.",
        "comment": "There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.",
        "alias": [
          "extensions",
          "user content"
        ],
        "min": 0,
        "max": "*",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:halfLife.url",
        "path": "Extension.extension.extension.url",
        "representation": [
          "xmlAttr"
        ],
        "short": "identifies the meaning of the extension",
        "definition": "Source of the definition for the extension code - a logical name or a URL.",
        "comment": "The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "type": [
          {
            "code": "uri"
          }
        ],
        "fixedUri": "halfLife",
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:halfLife.value[x]",
        "path": "Extension.extension.extension.value[x]",
        "short": "Half life - for a non-natural nuclide",
        "definition": "Half life - for a non-natural nuclide.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "Quantity"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:molecularWeight",
        "path": "Extension.extension.extension",
        "sliceName": "molecularWeight",
        "short": "R4: The molecular weight or weight range (for proteins, polymers or nucleic acids) (new)",
        "definition": "R4: `SubstanceSpecification.structure.isotope.molecularWeight` (new:BackboneElement)",
        "comment": "Element `SubstanceSpecification.structure.isotope.molecularWeight` is part of an existing definition because parent element `SubstanceSpecification.structure.isotope` requires a cross-version extension.\nElement `SubstanceSpecification.structure.isotope.molecularWeight` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.isotope.molecularWeight` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "requirements": "Element `SubstanceSpecification.structure.isotope.molecularWeight` is part of an existing definition because parent element `SubstanceSpecification.structure.isotope` requires a cross-version extension.\nElement `SubstanceSpecification.structure.isotope.molecularWeight` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.isotope.molecularWeight` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).\nCreating extension because element `SubstanceSpecification.structure.isotope.molecularWeight` is a content reference and requires an extesion definition.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:molecularWeight.id",
        "path": "Extension.extension.extension.id",
        "representation": [
          "xmlAttr"
        ],
        "short": "xml:id (or equivalent in JSON)",
        "definition": "unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.id",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "string"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:molecularWeight.extension",
        "path": "Extension.extension.extension.extension",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "url"
            }
          ],
          "description": "Extensions are always sliced by (at least) url",
          "ordered": false,
          "rules": "open"
        },
        "short": "Extension",
        "definition": "An Extension",
        "min": 0,
        "max": "*",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:molecularWeight.extension:method",
        "path": "Extension.extension.extension.extension",
        "sliceName": "method",
        "short": "R4: The method by which the molecular weight was determined (new)",
        "definition": "R4: `SubstanceSpecification.structure.isotope.molecularWeight.method` (new:CodeableConcept)",
        "comment": "Element `SubstanceSpecification.structure.isotope.molecularWeight.method` is part of an existing definition because parent element `SubstanceSpecification.structure.isotope.molecularWeight` requires a cross-version extension.\nElement `SubstanceSpecification.structure.isotope.molecularWeight.method` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.isotope.molecularWeight.method` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "requirements": "Element `SubstanceSpecification.structure.isotope.molecularWeight.method` is part of an existing definition because parent element `SubstanceSpecification.structure.isotope.molecularWeight` requires a cross-version extension.\nElement `SubstanceSpecification.structure.isotope.molecularWeight.method` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.isotope.molecularWeight.method` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:molecularWeight.extension:method.id",
        "path": "Extension.extension.extension.extension.id",
        "representation": [
          "xmlAttr"
        ],
        "short": "xml:id (or equivalent in JSON)",
        "definition": "unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.id",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "string"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:molecularWeight.extension:method.extension",
        "path": "Extension.extension.extension.extension.extension",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "url"
            }
          ],
          "description": "Extensions are always sliced by (at least) url",
          "rules": "open"
        },
        "short": "Additional Content defined by implementations",
        "definition": "May be used to represent additional information that is not part of the basic definition of the element. In order to make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.",
        "comment": "There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.",
        "alias": [
          "extensions",
          "user content"
        ],
        "min": 0,
        "max": "*",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:molecularWeight.extension:method.url",
        "path": "Extension.extension.extension.extension.url",
        "representation": [
          "xmlAttr"
        ],
        "short": "identifies the meaning of the extension",
        "definition": "Source of the definition for the extension code - a logical name or a URL.",
        "comment": "The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "type": [
          {
            "code": "uri"
          }
        ],
        "fixedUri": "method",
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:molecularWeight.extension:method.value[x]",
        "path": "Extension.extension.extension.extension.value[x]",
        "short": "The method by which the molecular weight was determined",
        "definition": "The method by which the molecular weight was determined.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "CodeableConcept"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:molecularWeight.extension:type",
        "path": "Extension.extension.extension.extension",
        "sliceName": "type",
        "short": "R4: Type of molecular weight such as exact, average (also known as. number average), weight average (new)",
        "definition": "R4: `SubstanceSpecification.structure.isotope.molecularWeight.type` (new:CodeableConcept)",
        "comment": "Element `SubstanceSpecification.structure.isotope.molecularWeight.type` is part of an existing definition because parent element `SubstanceSpecification.structure.isotope.molecularWeight` requires a cross-version extension.\nElement `SubstanceSpecification.structure.isotope.molecularWeight.type` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.isotope.molecularWeight.type` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "requirements": "Element `SubstanceSpecification.structure.isotope.molecularWeight.type` is part of an existing definition because parent element `SubstanceSpecification.structure.isotope.molecularWeight` requires a cross-version extension.\nElement `SubstanceSpecification.structure.isotope.molecularWeight.type` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.isotope.molecularWeight.type` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:molecularWeight.extension:type.id",
        "path": "Extension.extension.extension.extension.id",
        "representation": [
          "xmlAttr"
        ],
        "short": "xml:id (or equivalent in JSON)",
        "definition": "unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.id",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "string"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:molecularWeight.extension:type.extension",
        "path": "Extension.extension.extension.extension.extension",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "url"
            }
          ],
          "description": "Extensions are always sliced by (at least) url",
          "rules": "open"
        },
        "short": "Additional Content defined by implementations",
        "definition": "May be used to represent additional information that is not part of the basic definition of the element. In order to make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.",
        "comment": "There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.",
        "alias": [
          "extensions",
          "user content"
        ],
        "min": 0,
        "max": "*",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:molecularWeight.extension:type.url",
        "path": "Extension.extension.extension.extension.url",
        "representation": [
          "xmlAttr"
        ],
        "short": "identifies the meaning of the extension",
        "definition": "Source of the definition for the extension code - a logical name or a URL.",
        "comment": "The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "type": [
          {
            "code": "uri"
          }
        ],
        "fixedUri": "type",
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:molecularWeight.extension:type.value[x]",
        "path": "Extension.extension.extension.extension.value[x]",
        "short": "Type of molecular weight such as exact, average (also known as. number average), weight average",
        "definition": "Type of molecular weight such as exact, average (also known as. number average), weight average.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "CodeableConcept"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:molecularWeight.extension:amount",
        "path": "Extension.extension.extension.extension",
        "sliceName": "amount",
        "short": "R4: Used to capture quantitative values for a variety of elements. If only limits are given, the arithmetic mean would be the average. If only a single definite value for a given element is given, it would be captured in this field (new)",
        "definition": "R4: `SubstanceSpecification.structure.isotope.molecularWeight.amount` (new:Quantity)",
        "comment": "Element `SubstanceSpecification.structure.isotope.molecularWeight.amount` is part of an existing definition because parent element `SubstanceSpecification.structure.isotope.molecularWeight` requires a cross-version extension.\nElement `SubstanceSpecification.structure.isotope.molecularWeight.amount` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.isotope.molecularWeight.amount` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "requirements": "Element `SubstanceSpecification.structure.isotope.molecularWeight.amount` is part of an existing definition because parent element `SubstanceSpecification.structure.isotope.molecularWeight` requires a cross-version extension.\nElement `SubstanceSpecification.structure.isotope.molecularWeight.amount` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.isotope.molecularWeight.amount` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:molecularWeight.extension:amount.id",
        "path": "Extension.extension.extension.extension.id",
        "representation": [
          "xmlAttr"
        ],
        "short": "xml:id (or equivalent in JSON)",
        "definition": "unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.id",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "string"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:molecularWeight.extension:amount.extension",
        "path": "Extension.extension.extension.extension.extension",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "url"
            }
          ],
          "description": "Extensions are always sliced by (at least) url",
          "rules": "open"
        },
        "short": "Additional Content defined by implementations",
        "definition": "May be used to represent additional information that is not part of the basic definition of the element. In order to make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.",
        "comment": "There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.",
        "alias": [
          "extensions",
          "user content"
        ],
        "min": 0,
        "max": "*",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:molecularWeight.extension:amount.url",
        "path": "Extension.extension.extension.extension.url",
        "representation": [
          "xmlAttr"
        ],
        "short": "identifies the meaning of the extension",
        "definition": "Source of the definition for the extension code - a logical name or a URL.",
        "comment": "The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "type": [
          {
            "code": "uri"
          }
        ],
        "fixedUri": "amount",
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:molecularWeight.extension:amount.value[x]",
        "path": "Extension.extension.extension.extension.value[x]",
        "short": "Used to capture quantitative values for a variety of elements. If only limits are given, the arithmetic mean would be the average. If only a single definite value for a given element is given, it would be captured in this field",
        "definition": "Used to capture quantitative values for a variety of elements. If only limits are given, the arithmetic mean would be the average. If only a single definite value for a given element is given, it would be captured in this field.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "Quantity"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:molecularWeight.url",
        "path": "Extension.extension.extension.url",
        "representation": [
          "xmlAttr"
        ],
        "short": "identifies the meaning of the extension",
        "definition": "Source of the definition for the extension code - a logical name or a URL.",
        "comment": "The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "type": [
          {
            "code": "uri"
          }
        ],
        "fixedUri": "molecularWeight",
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:molecularWeight.value[x]",
        "path": "Extension.extension.extension.value[x]",
        "short": "Value of extension",
        "definition": "Value of extension - may be a resource or one of a constrained set of the data types (see Extensibility in the spec for list).",
        "min": 0,
        "max": "0",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "base64Binary"
          },
          {
            "code": "boolean"
          },
          {
            "code": "code"
          },
          {
            "code": "date"
          },
          {
            "code": "dateTime"
          },
          {
            "code": "decimal"
          },
          {
            "code": "id"
          },
          {
            "code": "instant"
          },
          {
            "code": "integer"
          },
          {
            "code": "markdown"
          },
          {
            "code": "oid"
          },
          {
            "code": "positiveInt"
          },
          {
            "code": "string"
          },
          {
            "code": "time"
          },
          {
            "code": "unsignedInt"
          },
          {
            "code": "uri"
          },
          {
            "code": "Address"
          },
          {
            "code": "Age"
          },
          {
            "code": "Annotation"
          },
          {
            "code": "Attachment"
          },
          {
            "code": "CodeableConcept"
          },
          {
            "code": "Coding"
          },
          {
            "code": "ContactPoint"
          },
          {
            "code": "Count"
          },
          {
            "code": "Distance"
          },
          {
            "code": "Duration"
          },
          {
            "code": "HumanName"
          },
          {
            "code": "Identifier"
          },
          {
            "code": "Money"
          },
          {
            "code": "Period"
          },
          {
            "code": "Quantity"
          },
          {
            "code": "Range"
          },
          {
            "code": "Ratio"
          },
          {
            "code": "Reference"
          },
          {
            "code": "SampledData"
          },
          {
            "code": "Signature"
          },
          {
            "code": "Timing"
          },
          {
            "code": "Meta"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.url",
        "path": "Extension.extension.url",
        "representation": [
          "xmlAttr"
        ],
        "short": "identifies the meaning of the extension",
        "definition": "Source of the definition for the extension code - a logical name or a URL.",
        "comment": "The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "type": [
          {
            "code": "uri"
          }
        ],
        "fixedUri": "isotope",
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.value[x]",
        "path": "Extension.extension.value[x]",
        "short": "Value of extension",
        "definition": "Value of extension - may be a resource or one of a constrained set of the data types (see Extensibility in the spec for list).",
        "min": 0,
        "max": "0",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "base64Binary"
          },
          {
            "code": "boolean"
          },
          {
            "code": "code"
          },
          {
            "code": "date"
          },
          {
            "code": "dateTime"
          },
          {
            "code": "decimal"
          },
          {
            "code": "id"
          },
          {
            "code": "instant"
          },
          {
            "code": "integer"
          },
          {
            "code": "markdown"
          },
          {
            "code": "oid"
          },
          {
            "code": "positiveInt"
          },
          {
            "code": "string"
          },
          {
            "code": "time"
          },
          {
            "code": "unsignedInt"
          },
          {
            "code": "uri"
          },
          {
            "code": "Address"
          },
          {
            "code": "Age"
          },
          {
            "code": "Annotation"
          },
          {
            "code": "Attachment"
          },
          {
            "code": "CodeableConcept"
          },
          {
            "code": "Coding"
          },
          {
            "code": "ContactPoint"
          },
          {
            "code": "Count"
          },
          {
            "code": "Distance"
          },
          {
            "code": "Duration"
          },
          {
            "code": "HumanName"
          },
          {
            "code": "Identifier"
          },
          {
            "code": "Money"
          },
          {
            "code": "Period"
          },
          {
            "code": "Quantity"
          },
          {
            "code": "Range"
          },
          {
            "code": "Ratio"
          },
          {
            "code": "Reference"
          },
          {
            "code": "SampledData"
          },
          {
            "code": "Signature"
          },
          {
            "code": "Timing"
          },
          {
            "code": "Meta"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.extension:molecularWeight",
        "path": "Extension.extension",
        "sliceName": "molecularWeight",
        "short": "R4: The molecular weight or weight range (for proteins, polymers or nucleic acids) (new)",
        "definition": "R4: `SubstanceSpecification.structure.molecularWeight` (new:SubstanceSpecification.structure.isotope.molecularWeight)",
        "comment": "Element `SubstanceSpecification.structure.molecularWeight` is part of an existing definition because parent element `SubstanceSpecification.structure` requires a cross-version extension.\nElement `SubstanceSpecification.structure.molecularWeight` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.molecularWeight` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "requirements": "Element `SubstanceSpecification.structure.molecularWeight` is part of an existing definition because parent element `SubstanceSpecification.structure` requires a cross-version extension.\nElement `SubstanceSpecification.structure.molecularWeight` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.molecularWeight` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ]
      },
      {
        "id": "Extension.extension:molecularWeight.id",
        "path": "Extension.extension.id",
        "representation": [
          "xmlAttr"
        ],
        "short": "xml:id (or equivalent in JSON)",
        "definition": "unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.id",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "string"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension:molecularWeight.extension",
        "path": "Extension.extension.extension",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "url"
            }
          ],
          "description": "Extensions are always sliced by (at least) url",
          "rules": "open"
        },
        "short": "Additional Content defined by implementations",
        "definition": "May be used to represent additional information that is not part of the basic definition of the element. In order to make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.",
        "comment": "There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.",
        "alias": [
          "extensions",
          "user content"
        ],
        "min": 0,
        "max": "*",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension:molecularWeight.url",
        "path": "Extension.extension.url",
        "representation": [
          "xmlAttr"
        ],
        "short": "identifies the meaning of the extension",
        "definition": "Source of the definition for the extension code - a logical name or a URL.",
        "comment": "The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "type": [
          {
            "code": "uri"
          }
        ],
        "fixedUri": "http://hl7.org/fhir/4.0/StructureDefinition/extension-SubstanceSpecification.structure.isotope.molecularWeight",
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.extension:molecularWeight.value[x]",
        "path": "Extension.extension.value[x]",
        "short": "Value of extension",
        "definition": "Value of extension - may be a resource or one of a constrained set of the data types (see Extensibility in the spec for list).",
        "min": 0,
        "max": "0",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "base64Binary"
          },
          {
            "code": "boolean"
          },
          {
            "code": "code"
          },
          {
            "code": "date"
          },
          {
            "code": "dateTime"
          },
          {
            "code": "decimal"
          },
          {
            "code": "id"
          },
          {
            "code": "instant"
          },
          {
            "code": "integer"
          },
          {
            "code": "markdown"
          },
          {
            "code": "oid"
          },
          {
            "code": "positiveInt"
          },
          {
            "code": "string"
          },
          {
            "code": "time"
          },
          {
            "code": "unsignedInt"
          },
          {
            "code": "uri"
          },
          {
            "code": "Address"
          },
          {
            "code": "Age"
          },
          {
            "code": "Annotation"
          },
          {
            "code": "Attachment"
          },
          {
            "code": "CodeableConcept"
          },
          {
            "code": "Coding"
          },
          {
            "code": "ContactPoint"
          },
          {
            "code": "Count"
          },
          {
            "code": "Distance"
          },
          {
            "code": "Duration"
          },
          {
            "code": "HumanName"
          },
          {
            "code": "Identifier"
          },
          {
            "code": "Money"
          },
          {
            "code": "Period"
          },
          {
            "code": "Quantity"
          },
          {
            "code": "Range"
          },
          {
            "code": "Ratio"
          },
          {
            "code": "Reference"
          },
          {
            "code": "SampledData"
          },
          {
            "code": "Signature"
          },
          {
            "code": "Timing"
          },
          {
            "code": "Meta"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.extension:source",
        "path": "Extension.extension",
        "sliceName": "source",
        "short": "R4: Supporting literature (new)",
        "definition": "R4: `SubstanceSpecification.structure.source` (new:Reference(DocumentReference))",
        "comment": "Element `SubstanceSpecification.structure.source` is part of an existing definition because parent element `SubstanceSpecification.structure` requires a cross-version extension.\nElement `SubstanceSpecification.structure.source` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.source` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "requirements": "Element `SubstanceSpecification.structure.source` is part of an existing definition because parent element `SubstanceSpecification.structure` requires a cross-version extension.\nElement `SubstanceSpecification.structure.source` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.source` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "min": 0,
        "max": "*",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ]
      },
      {
        "id": "Extension.extension:source.id",
        "path": "Extension.extension.id",
        "representation": [
          "xmlAttr"
        ],
        "short": "xml:id (or equivalent in JSON)",
        "definition": "unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.id",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "string"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension:source.extension",
        "path": "Extension.extension.extension",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "url"
            }
          ],
          "description": "Extensions are always sliced by (at least) url",
          "rules": "open"
        },
        "short": "Additional Content defined by implementations",
        "definition": "May be used to represent additional information that is not part of the basic definition of the element. In order to make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.",
        "comment": "There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.",
        "alias": [
          "extensions",
          "user content"
        ],
        "min": 0,
        "max": "*",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension:source.url",
        "path": "Extension.extension.url",
        "representation": [
          "xmlAttr"
        ],
        "short": "identifies the meaning of the extension",
        "definition": "Source of the definition for the extension code - a logical name or a URL.",
        "comment": "The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "type": [
          {
            "code": "uri"
          }
        ],
        "fixedUri": "source",
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.extension:source.value[x]",
        "path": "Extension.extension.value[x]",
        "short": "Supporting literature",
        "definition": "Supporting literature.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "Reference",
            "targetProfile": "http://hl7.org/fhir/4.0/StructureDefinition/profile-DocumentReference|0.1.0"
          },
          {
            "code": "Reference",
            "targetProfile": "http://hl7.org/fhir/StructureDefinition/DocumentReference"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.extension:representation",
        "path": "Extension.extension",
        "sliceName": "representation",
        "short": "R4: Molecular structural representation (new)",
        "definition": "R4: `SubstanceSpecification.structure.representation` (new:BackboneElement)",
        "comment": "Element `SubstanceSpecification.structure.representation` is part of an existing definition because parent element `SubstanceSpecification.structure` requires a cross-version extension.\nElement `SubstanceSpecification.structure.representation` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.representation` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "requirements": "Element `SubstanceSpecification.structure.representation` is part of an existing definition because parent element `SubstanceSpecification.structure` requires a cross-version extension.\nElement `SubstanceSpecification.structure.representation` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.representation` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "min": 0,
        "max": "*",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ]
      },
      {
        "id": "Extension.extension:representation.id",
        "path": "Extension.extension.id",
        "representation": [
          "xmlAttr"
        ],
        "short": "xml:id (or equivalent in JSON)",
        "definition": "unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.id",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "string"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension:representation.extension",
        "path": "Extension.extension.extension",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "url"
            }
          ],
          "description": "Extensions are always sliced by (at least) url",
          "ordered": false,
          "rules": "open"
        },
        "short": "Extension",
        "definition": "An Extension",
        "min": 0,
        "max": "*",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ]
      },
      {
        "id": "Extension.extension:representation.extension:type",
        "path": "Extension.extension.extension",
        "sliceName": "type",
        "short": "R4: The type of structure (e.g. Full, Partial, Representative) (new)",
        "definition": "R4: `SubstanceSpecification.structure.representation.type` (new:CodeableConcept)",
        "comment": "Element `SubstanceSpecification.structure.representation.type` is part of an existing definition because parent element `SubstanceSpecification.structure.representation` requires a cross-version extension.\nElement `SubstanceSpecification.structure.representation.type` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.representation.type` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "requirements": "Element `SubstanceSpecification.structure.representation.type` is part of an existing definition because parent element `SubstanceSpecification.structure.representation` requires a cross-version extension.\nElement `SubstanceSpecification.structure.representation.type` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.representation.type` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ]
      },
      {
        "id": "Extension.extension:representation.extension:type.id",
        "path": "Extension.extension.extension.id",
        "representation": [
          "xmlAttr"
        ],
        "short": "xml:id (or equivalent in JSON)",
        "definition": "unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.id",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "string"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension:representation.extension:type.extension",
        "path": "Extension.extension.extension.extension",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "url"
            }
          ],
          "description": "Extensions are always sliced by (at least) url",
          "rules": "open"
        },
        "short": "Additional Content defined by implementations",
        "definition": "May be used to represent additional information that is not part of the basic definition of the element. In order to make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.",
        "comment": "There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.",
        "alias": [
          "extensions",
          "user content"
        ],
        "min": 0,
        "max": "*",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension:representation.extension:type.url",
        "path": "Extension.extension.extension.url",
        "representation": [
          "xmlAttr"
        ],
        "short": "identifies the meaning of the extension",
        "definition": "Source of the definition for the extension code - a logical name or a URL.",
        "comment": "The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "type": [
          {
            "code": "uri"
          }
        ],
        "fixedUri": "type",
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.extension:representation.extension:type.value[x]",
        "path": "Extension.extension.extension.value[x]",
        "short": "The type of structure (e.g. Full, Partial, Representative)",
        "definition": "The type of structure (e.g. Full, Partial, Representative).",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "CodeableConcept"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.extension:representation.extension:representation",
        "path": "Extension.extension.extension",
        "sliceName": "representation",
        "short": "R4: The structural representation as text string in a format e.g. InChI, SMILES, MOLFILE, CDX (new)",
        "definition": "R4: `SubstanceSpecification.structure.representation.representation` (new:string)",
        "comment": "Element `SubstanceSpecification.structure.representation.representation` is part of an existing definition because parent element `SubstanceSpecification.structure.representation` requires a cross-version extension.\nElement `SubstanceSpecification.structure.representation.representation` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.representation.representation` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "requirements": "Element `SubstanceSpecification.structure.representation.representation` is part of an existing definition because parent element `SubstanceSpecification.structure.representation` requires a cross-version extension.\nElement `SubstanceSpecification.structure.representation.representation` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.representation.representation` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ]
      },
      {
        "id": "Extension.extension:representation.extension:representation.id",
        "path": "Extension.extension.extension.id",
        "representation": [
          "xmlAttr"
        ],
        "short": "xml:id (or equivalent in JSON)",
        "definition": "unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.id",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "string"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension:representation.extension:representation.extension",
        "path": "Extension.extension.extension.extension",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "url"
            }
          ],
          "description": "Extensions are always sliced by (at least) url",
          "rules": "open"
        },
        "short": "Additional Content defined by implementations",
        "definition": "May be used to represent additional information that is not part of the basic definition of the element. In order to make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.",
        "comment": "There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.",
        "alias": [
          "extensions",
          "user content"
        ],
        "min": 0,
        "max": "*",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension:representation.extension:representation.url",
        "path": "Extension.extension.extension.url",
        "representation": [
          "xmlAttr"
        ],
        "short": "identifies the meaning of the extension",
        "definition": "Source of the definition for the extension code - a logical name or a URL.",
        "comment": "The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "type": [
          {
            "code": "uri"
          }
        ],
        "fixedUri": "representation",
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.extension:representation.extension:representation.value[x]",
        "path": "Extension.extension.extension.value[x]",
        "short": "The structural representation as text string in a format e.g. InChI, SMILES, MOLFILE, CDX",
        "definition": "The structural representation as text string in a format e.g. InChI, SMILES, MOLFILE, CDX.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "string"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.extension:representation.extension:attachment",
        "path": "Extension.extension.extension",
        "sliceName": "attachment",
        "short": "R4: An attached file with the structural representation (new)",
        "definition": "R4: `SubstanceSpecification.structure.representation.attachment` (new:Attachment)",
        "comment": "Element `SubstanceSpecification.structure.representation.attachment` is part of an existing definition because parent element `SubstanceSpecification.structure.representation` requires a cross-version extension.\nElement `SubstanceSpecification.structure.representation.attachment` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.representation.attachment` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "requirements": "Element `SubstanceSpecification.structure.representation.attachment` is part of an existing definition because parent element `SubstanceSpecification.structure.representation` requires a cross-version extension.\nElement `SubstanceSpecification.structure.representation.attachment` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.representation.attachment` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ]
      },
      {
        "id": "Extension.extension:representation.extension:attachment.id",
        "path": "Extension.extension.extension.id",
        "representation": [
          "xmlAttr"
        ],
        "short": "xml:id (or equivalent in JSON)",
        "definition": "unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.id",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "string"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension:representation.extension:attachment.extension",
        "path": "Extension.extension.extension.extension",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "url"
            }
          ],
          "description": "Extensions are always sliced by (at least) url",
          "rules": "open"
        },
        "short": "Additional Content defined by implementations",
        "definition": "May be used to represent additional information that is not part of the basic definition of the element. In order to make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.",
        "comment": "There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.",
        "alias": [
          "extensions",
          "user content"
        ],
        "min": 0,
        "max": "*",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension:representation.extension:attachment.url",
        "path": "Extension.extension.extension.url",
        "representation": [
          "xmlAttr"
        ],
        "short": "identifies the meaning of the extension",
        "definition": "Source of the definition for the extension code - a logical name or a URL.",
        "comment": "The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "type": [
          {
            "code": "uri"
          }
        ],
        "fixedUri": "attachment",
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.extension:representation.extension:attachment.value[x]",
        "path": "Extension.extension.extension.value[x]",
        "short": "An attached file with the structural representation",
        "definition": "An attached file with the structural representation.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "Attachment"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.extension:representation.url",
        "path": "Extension.extension.url",
        "representation": [
          "xmlAttr"
        ],
        "short": "identifies the meaning of the extension",
        "definition": "Source of the definition for the extension code - a logical name or a URL.",
        "comment": "The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "type": [
          {
            "code": "uri"
          }
        ],
        "fixedUri": "representation",
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.extension:representation.value[x]",
        "path": "Extension.extension.value[x]",
        "short": "Value of extension",
        "definition": "Value of extension - may be a resource or one of a constrained set of the data types (see Extensibility in the spec for list).",
        "min": 0,
        "max": "0",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "base64Binary"
          },
          {
            "code": "boolean"
          },
          {
            "code": "code"
          },
          {
            "code": "date"
          },
          {
            "code": "dateTime"
          },
          {
            "code": "decimal"
          },
          {
            "code": "id"
          },
          {
            "code": "instant"
          },
          {
            "code": "integer"
          },
          {
            "code": "markdown"
          },
          {
            "code": "oid"
          },
          {
            "code": "positiveInt"
          },
          {
            "code": "string"
          },
          {
            "code": "time"
          },
          {
            "code": "unsignedInt"
          },
          {
            "code": "uri"
          },
          {
            "code": "Address"
          },
          {
            "code": "Age"
          },
          {
            "code": "Annotation"
          },
          {
            "code": "Attachment"
          },
          {
            "code": "CodeableConcept"
          },
          {
            "code": "Coding"
          },
          {
            "code": "ContactPoint"
          },
          {
            "code": "Count"
          },
          {
            "code": "Distance"
          },
          {
            "code": "Duration"
          },
          {
            "code": "HumanName"
          },
          {
            "code": "Identifier"
          },
          {
            "code": "Money"
          },
          {
            "code": "Period"
          },
          {
            "code": "Quantity"
          },
          {
            "code": "Range"
          },
          {
            "code": "Ratio"
          },
          {
            "code": "Reference"
          },
          {
            "code": "SampledData"
          },
          {
            "code": "Signature"
          },
          {
            "code": "Timing"
          },
          {
            "code": "Meta"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.url",
        "path": "Extension.url",
        "representation": [
          "xmlAttr"
        ],
        "short": "identifies the meaning of the extension",
        "definition": "Source of the definition for the extension code - a logical name or a URL.",
        "comment": "The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "type": [
          {
            "code": "uri"
          }
        ],
        "fixedUri": "http://hl7.org/fhir/4.0/StructureDefinition/extension-SubstanceSpecification.structure",
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.value[x]",
        "path": "Extension.value[x]",
        "short": "Value of extension",
        "definition": "Value of extension - may be a resource or one of a constrained set of the data types (see Extensibility in the spec for list).",
        "min": 0,
        "max": "0",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "base64Binary"
          },
          {
            "code": "boolean"
          },
          {
            "code": "code"
          },
          {
            "code": "date"
          },
          {
            "code": "dateTime"
          },
          {
            "code": "decimal"
          },
          {
            "code": "id"
          },
          {
            "code": "instant"
          },
          {
            "code": "integer"
          },
          {
            "code": "markdown"
          },
          {
            "code": "oid"
          },
          {
            "code": "positiveInt"
          },
          {
            "code": "string"
          },
          {
            "code": "time"
          },
          {
            "code": "unsignedInt"
          },
          {
            "code": "uri"
          },
          {
            "code": "Address"
          },
          {
            "code": "Age"
          },
          {
            "code": "Annotation"
          },
          {
            "code": "Attachment"
          },
          {
            "code": "CodeableConcept"
          },
          {
            "code": "Coding"
          },
          {
            "code": "ContactPoint"
          },
          {
            "code": "Count"
          },
          {
            "code": "Distance"
          },
          {
            "code": "Duration"
          },
          {
            "code": "HumanName"
          },
          {
            "code": "Identifier"
          },
          {
            "code": "Money"
          },
          {
            "code": "Period"
          },
          {
            "code": "Quantity"
          },
          {
            "code": "Range"
          },
          {
            "code": "Ratio"
          },
          {
            "code": "Reference"
          },
          {
            "code": "SampledData"
          },
          {
            "code": "Signature"
          },
          {
            "code": "Timing"
          },
          {
            "code": "Meta"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      }
    ]
  },
  "differential": {
    "element": [
      {
        "id": "Extension",
        "path": "Extension",
        "short": "R4: Structural information (new)",
        "definition": "R4: `SubstanceSpecification.structure` (new:BackboneElement)",
        "comment": "Element `SubstanceSpecification.structure` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension",
          "min": 0,
          "max": "*"
        },
        "isModifier": false
      },
      {
        "id": "Extension.extension",
        "path": "Extension.extension",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "url"
            }
          ],
          "ordered": false,
          "rules": "open"
        },
        "min": 0,
        "max": "*",
        "base": {
          "path": "Extension.extension",
          "min": 0,
          "max": "*"
        }
      },
      {
        "id": "Extension.extension:stereochemistry",
        "path": "Extension.extension",
        "sliceName": "stereochemistry",
        "short": "R4: Stereochemistry type (new)",
        "definition": "R4: `SubstanceSpecification.structure.stereochemistry` (new:CodeableConcept)",
        "comment": "Element `SubstanceSpecification.structure.stereochemistry` is part of an existing definition because parent element `SubstanceSpecification.structure` requires a cross-version extension.\nElement `SubstanceSpecification.structure.stereochemistry` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.stereochemistry` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "requirements": "Element `SubstanceSpecification.structure.stereochemistry` is part of an existing definition because parent element `SubstanceSpecification.structure` requires a cross-version extension.\nElement `SubstanceSpecification.structure.stereochemistry` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.stereochemistry` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.extension",
          "min": 0,
          "max": "*"
        }
      },
      {
        "id": "Extension.extension:stereochemistry.url",
        "path": "Extension.extension.url",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "fixedUri": "stereochemistry"
      },
      {
        "id": "Extension.extension:stereochemistry.value[x]",
        "path": "Extension.extension.value[x]",
        "short": "Stereochemistry type",
        "definition": "Stereochemistry type.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "CodeableConcept"
          }
        ]
      },
      {
        "id": "Extension.extension:opticalActivity",
        "path": "Extension.extension",
        "sliceName": "opticalActivity",
        "short": "R4: Optical activity type (new)",
        "definition": "R4: `SubstanceSpecification.structure.opticalActivity` (new:CodeableConcept)",
        "comment": "Element `SubstanceSpecification.structure.opticalActivity` is part of an existing definition because parent element `SubstanceSpecification.structure` requires a cross-version extension.\nElement `SubstanceSpecification.structure.opticalActivity` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.opticalActivity` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "requirements": "Element `SubstanceSpecification.structure.opticalActivity` is part of an existing definition because parent element `SubstanceSpecification.structure` requires a cross-version extension.\nElement `SubstanceSpecification.structure.opticalActivity` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.opticalActivity` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.extension",
          "min": 0,
          "max": "*"
        }
      },
      {
        "id": "Extension.extension:opticalActivity.url",
        "path": "Extension.extension.url",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "fixedUri": "opticalActivity"
      },
      {
        "id": "Extension.extension:opticalActivity.value[x]",
        "path": "Extension.extension.value[x]",
        "short": "Optical activity type",
        "definition": "Optical activity type.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "CodeableConcept"
          }
        ]
      },
      {
        "id": "Extension.extension:molecularFormula",
        "path": "Extension.extension",
        "sliceName": "molecularFormula",
        "short": "R4: Molecular formula (new)",
        "definition": "R4: `SubstanceSpecification.structure.molecularFormula` (new:string)",
        "comment": "Element `SubstanceSpecification.structure.molecularFormula` is part of an existing definition because parent element `SubstanceSpecification.structure` requires a cross-version extension.\nElement `SubstanceSpecification.structure.molecularFormula` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.molecularFormula` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "requirements": "Element `SubstanceSpecification.structure.molecularFormula` is part of an existing definition because parent element `SubstanceSpecification.structure` requires a cross-version extension.\nElement `SubstanceSpecification.structure.molecularFormula` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.molecularFormula` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.extension",
          "min": 0,
          "max": "*"
        }
      },
      {
        "id": "Extension.extension:molecularFormula.url",
        "path": "Extension.extension.url",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "fixedUri": "molecularFormula"
      },
      {
        "id": "Extension.extension:molecularFormula.value[x]",
        "path": "Extension.extension.value[x]",
        "short": "Molecular formula",
        "definition": "Molecular formula.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "string"
          }
        ]
      },
      {
        "id": "Extension.extension:molecularFormulaByMoiety",
        "path": "Extension.extension",
        "sliceName": "molecularFormulaByMoiety",
        "short": "R4: Specified per moiety according to the Hill system, i.e. first C, then H, then alphabetical, each moiety separated by a dot (new)",
        "definition": "R4: `SubstanceSpecification.structure.molecularFormulaByMoiety` (new:string)",
        "comment": "Element `SubstanceSpecification.structure.molecularFormulaByMoiety` is part of an existing definition because parent element `SubstanceSpecification.structure` requires a cross-version extension.\nElement `SubstanceSpecification.structure.molecularFormulaByMoiety` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.molecularFormulaByMoiety` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "requirements": "Element `SubstanceSpecification.structure.molecularFormulaByMoiety` is part of an existing definition because parent element `SubstanceSpecification.structure` requires a cross-version extension.\nElement `SubstanceSpecification.structure.molecularFormulaByMoiety` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.molecularFormulaByMoiety` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.extension",
          "min": 0,
          "max": "*"
        }
      },
      {
        "id": "Extension.extension:molecularFormulaByMoiety.url",
        "path": "Extension.extension.url",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "fixedUri": "molecularFormulaByMoiety"
      },
      {
        "id": "Extension.extension:molecularFormulaByMoiety.value[x]",
        "path": "Extension.extension.value[x]",
        "short": "Specified per moiety according to the Hill system, i.e. first C, then H, then alphabetical, each moiety separated by a dot",
        "definition": "Specified per moiety according to the Hill system, i.e. first C, then H, then alphabetical, each moiety separated by a dot.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "string"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope",
        "path": "Extension.extension",
        "sliceName": "isotope",
        "short": "R4: Applicable for single substances that contain a radionuclide or a non-natural isotopic ratio (new)",
        "definition": "R4: `SubstanceSpecification.structure.isotope` (new:BackboneElement)",
        "comment": "Element `SubstanceSpecification.structure.isotope` is part of an existing definition because parent element `SubstanceSpecification.structure` requires a cross-version extension.\nElement `SubstanceSpecification.structure.isotope` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.isotope` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "requirements": "Element `SubstanceSpecification.structure.isotope` is part of an existing definition because parent element `SubstanceSpecification.structure` requires a cross-version extension.\nElement `SubstanceSpecification.structure.isotope` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.isotope` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "min": 0,
        "max": "*",
        "base": {
          "path": "Extension.extension",
          "min": 0,
          "max": "*"
        }
      },
      {
        "id": "Extension.extension:isotope.extension",
        "path": "Extension.extension.extension",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "url"
            }
          ],
          "ordered": false,
          "rules": "open"
        },
        "min": 0,
        "max": "*",
        "base": {
          "path": "Extension.extension",
          "min": 0,
          "max": "*"
        }
      },
      {
        "id": "Extension.extension:isotope.extension:identifier",
        "path": "Extension.extension.extension",
        "sliceName": "identifier",
        "short": "R4: Substance identifier for each non-natural or radioisotope (new)",
        "definition": "R4: `SubstanceSpecification.structure.isotope.identifier` (new:Identifier)",
        "comment": "Element `SubstanceSpecification.structure.isotope.identifier` is part of an existing definition because parent element `SubstanceSpecification.structure.isotope` requires a cross-version extension.\nElement `SubstanceSpecification.structure.isotope.identifier` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.isotope.identifier` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "requirements": "Element `SubstanceSpecification.structure.isotope.identifier` is part of an existing definition because parent element `SubstanceSpecification.structure.isotope` requires a cross-version extension.\nElement `SubstanceSpecification.structure.isotope.identifier` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.isotope.identifier` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.extension",
          "min": 0,
          "max": "*"
        }
      },
      {
        "id": "Extension.extension:isotope.extension:identifier.url",
        "path": "Extension.extension.extension.url",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "fixedUri": "identifier"
      },
      {
        "id": "Extension.extension:isotope.extension:identifier.value[x]",
        "path": "Extension.extension.extension.value[x]",
        "short": "Substance identifier for each non-natural or radioisotope",
        "definition": "Substance identifier for each non-natural or radioisotope.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "Identifier"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:name",
        "path": "Extension.extension.extension",
        "sliceName": "name",
        "short": "R4: Substance name for each non-natural or radioisotope (new)",
        "definition": "R4: `SubstanceSpecification.structure.isotope.name` (new:CodeableConcept)",
        "comment": "Element `SubstanceSpecification.structure.isotope.name` is part of an existing definition because parent element `SubstanceSpecification.structure.isotope` requires a cross-version extension.\nElement `SubstanceSpecification.structure.isotope.name` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.isotope.name` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "requirements": "Element `SubstanceSpecification.structure.isotope.name` is part of an existing definition because parent element `SubstanceSpecification.structure.isotope` requires a cross-version extension.\nElement `SubstanceSpecification.structure.isotope.name` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.isotope.name` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.extension",
          "min": 0,
          "max": "*"
        }
      },
      {
        "id": "Extension.extension:isotope.extension:name.url",
        "path": "Extension.extension.extension.url",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "fixedUri": "name"
      },
      {
        "id": "Extension.extension:isotope.extension:name.value[x]",
        "path": "Extension.extension.extension.value[x]",
        "short": "Substance name for each non-natural or radioisotope",
        "definition": "Substance name for each non-natural or radioisotope.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "CodeableConcept"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:substitution",
        "path": "Extension.extension.extension",
        "sliceName": "substitution",
        "short": "R4: The type of isotopic substitution present in a single substance (new)",
        "definition": "R4: `SubstanceSpecification.structure.isotope.substitution` (new:CodeableConcept)",
        "comment": "Element `SubstanceSpecification.structure.isotope.substitution` is part of an existing definition because parent element `SubstanceSpecification.structure.isotope` requires a cross-version extension.\nElement `SubstanceSpecification.structure.isotope.substitution` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.isotope.substitution` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "requirements": "Element `SubstanceSpecification.structure.isotope.substitution` is part of an existing definition because parent element `SubstanceSpecification.structure.isotope` requires a cross-version extension.\nElement `SubstanceSpecification.structure.isotope.substitution` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.isotope.substitution` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.extension",
          "min": 0,
          "max": "*"
        }
      },
      {
        "id": "Extension.extension:isotope.extension:substitution.url",
        "path": "Extension.extension.extension.url",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "fixedUri": "substitution"
      },
      {
        "id": "Extension.extension:isotope.extension:substitution.value[x]",
        "path": "Extension.extension.extension.value[x]",
        "short": "The type of isotopic substitution present in a single substance",
        "definition": "The type of isotopic substitution present in a single substance.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "CodeableConcept"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:halfLife",
        "path": "Extension.extension.extension",
        "sliceName": "halfLife",
        "short": "R4: Half life - for a non-natural nuclide (new)",
        "definition": "R4: `SubstanceSpecification.structure.isotope.halfLife` (new:Quantity)",
        "comment": "Element `SubstanceSpecification.structure.isotope.halfLife` is part of an existing definition because parent element `SubstanceSpecification.structure.isotope` requires a cross-version extension.\nElement `SubstanceSpecification.structure.isotope.halfLife` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.isotope.halfLife` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "requirements": "Element `SubstanceSpecification.structure.isotope.halfLife` is part of an existing definition because parent element `SubstanceSpecification.structure.isotope` requires a cross-version extension.\nElement `SubstanceSpecification.structure.isotope.halfLife` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.isotope.halfLife` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.extension",
          "min": 0,
          "max": "*"
        }
      },
      {
        "id": "Extension.extension:isotope.extension:halfLife.url",
        "path": "Extension.extension.extension.url",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "fixedUri": "halfLife"
      },
      {
        "id": "Extension.extension:isotope.extension:halfLife.value[x]",
        "path": "Extension.extension.extension.value[x]",
        "short": "Half life - for a non-natural nuclide",
        "definition": "Half life - for a non-natural nuclide.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "Quantity"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:molecularWeight",
        "path": "Extension.extension.extension",
        "sliceName": "molecularWeight",
        "short": "R4: The molecular weight or weight range (for proteins, polymers or nucleic acids) (new)",
        "definition": "R4: `SubstanceSpecification.structure.isotope.molecularWeight` (new:BackboneElement)",
        "comment": "Element `SubstanceSpecification.structure.isotope.molecularWeight` is part of an existing definition because parent element `SubstanceSpecification.structure.isotope` requires a cross-version extension.\nElement `SubstanceSpecification.structure.isotope.molecularWeight` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.isotope.molecularWeight` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "requirements": "Element `SubstanceSpecification.structure.isotope.molecularWeight` is part of an existing definition because parent element `SubstanceSpecification.structure.isotope` requires a cross-version extension.\nElement `SubstanceSpecification.structure.isotope.molecularWeight` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.isotope.molecularWeight` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).\nCreating extension because element `SubstanceSpecification.structure.isotope.molecularWeight` is a content reference and requires an extesion definition.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.extension",
          "min": 0,
          "max": "*"
        }
      },
      {
        "id": "Extension.extension:isotope.extension:molecularWeight.extension",
        "path": "Extension.extension.extension.extension",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "url"
            }
          ],
          "ordered": false,
          "rules": "open"
        },
        "min": 0,
        "max": "*",
        "base": {
          "path": "Extension.extension",
          "min": 0,
          "max": "*"
        }
      },
      {
        "id": "Extension.extension:isotope.extension:molecularWeight.extension:method",
        "path": "Extension.extension.extension.extension",
        "sliceName": "method",
        "short": "R4: The method by which the molecular weight was determined (new)",
        "definition": "R4: `SubstanceSpecification.structure.isotope.molecularWeight.method` (new:CodeableConcept)",
        "comment": "Element `SubstanceSpecification.structure.isotope.molecularWeight.method` is part of an existing definition because parent element `SubstanceSpecification.structure.isotope.molecularWeight` requires a cross-version extension.\nElement `SubstanceSpecification.structure.isotope.molecularWeight.method` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.isotope.molecularWeight.method` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "requirements": "Element `SubstanceSpecification.structure.isotope.molecularWeight.method` is part of an existing definition because parent element `SubstanceSpecification.structure.isotope.molecularWeight` requires a cross-version extension.\nElement `SubstanceSpecification.structure.isotope.molecularWeight.method` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.isotope.molecularWeight.method` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.extension",
          "min": 0,
          "max": "*"
        }
      },
      {
        "id": "Extension.extension:isotope.extension:molecularWeight.extension:method.url",
        "path": "Extension.extension.extension.extension.url",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "fixedUri": "method"
      },
      {
        "id": "Extension.extension:isotope.extension:molecularWeight.extension:method.value[x]",
        "path": "Extension.extension.extension.extension.value[x]",
        "short": "The method by which the molecular weight was determined",
        "definition": "The method by which the molecular weight was determined.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "CodeableConcept"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:molecularWeight.extension:type",
        "path": "Extension.extension.extension.extension",
        "sliceName": "type",
        "short": "R4: Type of molecular weight such as exact, average (also known as. number average), weight average (new)",
        "definition": "R4: `SubstanceSpecification.structure.isotope.molecularWeight.type` (new:CodeableConcept)",
        "comment": "Element `SubstanceSpecification.structure.isotope.molecularWeight.type` is part of an existing definition because parent element `SubstanceSpecification.structure.isotope.molecularWeight` requires a cross-version extension.\nElement `SubstanceSpecification.structure.isotope.molecularWeight.type` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.isotope.molecularWeight.type` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "requirements": "Element `SubstanceSpecification.structure.isotope.molecularWeight.type` is part of an existing definition because parent element `SubstanceSpecification.structure.isotope.molecularWeight` requires a cross-version extension.\nElement `SubstanceSpecification.structure.isotope.molecularWeight.type` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.isotope.molecularWeight.type` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.extension",
          "min": 0,
          "max": "*"
        }
      },
      {
        "id": "Extension.extension:isotope.extension:molecularWeight.extension:type.url",
        "path": "Extension.extension.extension.extension.url",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "fixedUri": "type"
      },
      {
        "id": "Extension.extension:isotope.extension:molecularWeight.extension:type.value[x]",
        "path": "Extension.extension.extension.extension.value[x]",
        "short": "Type of molecular weight such as exact, average (also known as. number average), weight average",
        "definition": "Type of molecular weight such as exact, average (also known as. number average), weight average.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "CodeableConcept"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:molecularWeight.extension:amount",
        "path": "Extension.extension.extension.extension",
        "sliceName": "amount",
        "short": "R4: Used to capture quantitative values for a variety of elements. If only limits are given, the arithmetic mean would be the average. If only a single definite value for a given element is given, it would be captured in this field (new)",
        "definition": "R4: `SubstanceSpecification.structure.isotope.molecularWeight.amount` (new:Quantity)",
        "comment": "Element `SubstanceSpecification.structure.isotope.molecularWeight.amount` is part of an existing definition because parent element `SubstanceSpecification.structure.isotope.molecularWeight` requires a cross-version extension.\nElement `SubstanceSpecification.structure.isotope.molecularWeight.amount` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.isotope.molecularWeight.amount` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "requirements": "Element `SubstanceSpecification.structure.isotope.molecularWeight.amount` is part of an existing definition because parent element `SubstanceSpecification.structure.isotope.molecularWeight` requires a cross-version extension.\nElement `SubstanceSpecification.structure.isotope.molecularWeight.amount` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.isotope.molecularWeight.amount` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.extension",
          "min": 0,
          "max": "*"
        }
      },
      {
        "id": "Extension.extension:isotope.extension:molecularWeight.extension:amount.url",
        "path": "Extension.extension.extension.extension.url",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "fixedUri": "amount"
      },
      {
        "id": "Extension.extension:isotope.extension:molecularWeight.extension:amount.value[x]",
        "path": "Extension.extension.extension.extension.value[x]",
        "short": "Used to capture quantitative values for a variety of elements. If only limits are given, the arithmetic mean would be the average. If only a single definite value for a given element is given, it would be captured in this field",
        "definition": "Used to capture quantitative values for a variety of elements. If only limits are given, the arithmetic mean would be the average. If only a single definite value for a given element is given, it would be captured in this field.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "Quantity"
          }
        ]
      },
      {
        "id": "Extension.extension:isotope.extension:molecularWeight.url",
        "path": "Extension.extension.extension.url",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "fixedUri": "molecularWeight"
      },
      {
        "id": "Extension.extension:isotope.extension:molecularWeight.value[x]",
        "path": "Extension.extension.extension.value[x]",
        "min": 0,
        "max": "0",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        }
      },
      {
        "id": "Extension.extension:isotope.url",
        "path": "Extension.extension.url",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "fixedUri": "isotope"
      },
      {
        "id": "Extension.extension:isotope.value[x]",
        "path": "Extension.extension.value[x]",
        "min": 0,
        "max": "0",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        }
      },
      {
        "id": "Extension.extension:molecularWeight",
        "path": "Extension.extension",
        "sliceName": "molecularWeight",
        "short": "R4: The molecular weight or weight range (for proteins, polymers or nucleic acids) (new)",
        "definition": "R4: `SubstanceSpecification.structure.molecularWeight` (new:SubstanceSpecification.structure.isotope.molecularWeight)",
        "comment": "Element `SubstanceSpecification.structure.molecularWeight` is part of an existing definition because parent element `SubstanceSpecification.structure` requires a cross-version extension.\nElement `SubstanceSpecification.structure.molecularWeight` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.molecularWeight` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "requirements": "Element `SubstanceSpecification.structure.molecularWeight` is part of an existing definition because parent element `SubstanceSpecification.structure` requires a cross-version extension.\nElement `SubstanceSpecification.structure.molecularWeight` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.molecularWeight` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.extension",
          "min": 0,
          "max": "*"
        }
      },
      {
        "id": "Extension.extension:molecularWeight.url",
        "path": "Extension.extension.url",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "fixedUri": "http://hl7.org/fhir/4.0/StructureDefinition/extension-SubstanceSpecification.structure.isotope.molecularWeight"
      },
      {
        "id": "Extension.extension:molecularWeight.value[x]",
        "path": "Extension.extension.value[x]",
        "min": 0,
        "max": "0",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        }
      },
      {
        "id": "Extension.extension:source",
        "path": "Extension.extension",
        "sliceName": "source",
        "short": "R4: Supporting literature (new)",
        "definition": "R4: `SubstanceSpecification.structure.source` (new:Reference(DocumentReference))",
        "comment": "Element `SubstanceSpecification.structure.source` is part of an existing definition because parent element `SubstanceSpecification.structure` requires a cross-version extension.\nElement `SubstanceSpecification.structure.source` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.source` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "requirements": "Element `SubstanceSpecification.structure.source` is part of an existing definition because parent element `SubstanceSpecification.structure` requires a cross-version extension.\nElement `SubstanceSpecification.structure.source` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.source` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "min": 0,
        "max": "*",
        "base": {
          "path": "Extension.extension",
          "min": 0,
          "max": "*"
        }
      },
      {
        "id": "Extension.extension:source.url",
        "path": "Extension.extension.url",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "fixedUri": "source"
      },
      {
        "id": "Extension.extension:source.value[x]",
        "path": "Extension.extension.value[x]",
        "short": "Supporting literature",
        "definition": "Supporting literature.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "Reference",
            "targetProfile": "http://hl7.org/fhir/4.0/StructureDefinition/profile-DocumentReference|0.1.0"
          },
          {
            "code": "Reference",
            "targetProfile": "http://hl7.org/fhir/StructureDefinition/DocumentReference"
          }
        ]
      },
      {
        "id": "Extension.extension:representation",
        "path": "Extension.extension",
        "sliceName": "representation",
        "short": "R4: Molecular structural representation (new)",
        "definition": "R4: `SubstanceSpecification.structure.representation` (new:BackboneElement)",
        "comment": "Element `SubstanceSpecification.structure.representation` is part of an existing definition because parent element `SubstanceSpecification.structure` requires a cross-version extension.\nElement `SubstanceSpecification.structure.representation` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.representation` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "requirements": "Element `SubstanceSpecification.structure.representation` is part of an existing definition because parent element `SubstanceSpecification.structure` requires a cross-version extension.\nElement `SubstanceSpecification.structure.representation` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.representation` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "min": 0,
        "max": "*",
        "base": {
          "path": "Extension.extension",
          "min": 0,
          "max": "*"
        }
      },
      {
        "id": "Extension.extension:representation.extension",
        "path": "Extension.extension.extension",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "url"
            }
          ],
          "ordered": false,
          "rules": "open"
        },
        "min": 0,
        "max": "*",
        "base": {
          "path": "Extension.extension",
          "min": 0,
          "max": "*"
        }
      },
      {
        "id": "Extension.extension:representation.extension:type",
        "path": "Extension.extension.extension",
        "sliceName": "type",
        "short": "R4: The type of structure (e.g. Full, Partial, Representative) (new)",
        "definition": "R4: `SubstanceSpecification.structure.representation.type` (new:CodeableConcept)",
        "comment": "Element `SubstanceSpecification.structure.representation.type` is part of an existing definition because parent element `SubstanceSpecification.structure.representation` requires a cross-version extension.\nElement `SubstanceSpecification.structure.representation.type` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.representation.type` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "requirements": "Element `SubstanceSpecification.structure.representation.type` is part of an existing definition because parent element `SubstanceSpecification.structure.representation` requires a cross-version extension.\nElement `SubstanceSpecification.structure.representation.type` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.representation.type` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.extension",
          "min": 0,
          "max": "*"
        }
      },
      {
        "id": "Extension.extension:representation.extension:type.url",
        "path": "Extension.extension.extension.url",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "fixedUri": "type"
      },
      {
        "id": "Extension.extension:representation.extension:type.value[x]",
        "path": "Extension.extension.extension.value[x]",
        "short": "The type of structure (e.g. Full, Partial, Representative)",
        "definition": "The type of structure (e.g. Full, Partial, Representative).",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "CodeableConcept"
          }
        ]
      },
      {
        "id": "Extension.extension:representation.extension:representation",
        "path": "Extension.extension.extension",
        "sliceName": "representation",
        "short": "R4: The structural representation as text string in a format e.g. InChI, SMILES, MOLFILE, CDX (new)",
        "definition": "R4: `SubstanceSpecification.structure.representation.representation` (new:string)",
        "comment": "Element `SubstanceSpecification.structure.representation.representation` is part of an existing definition because parent element `SubstanceSpecification.structure.representation` requires a cross-version extension.\nElement `SubstanceSpecification.structure.representation.representation` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.representation.representation` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "requirements": "Element `SubstanceSpecification.structure.representation.representation` is part of an existing definition because parent element `SubstanceSpecification.structure.representation` requires a cross-version extension.\nElement `SubstanceSpecification.structure.representation.representation` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.representation.representation` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.extension",
          "min": 0,
          "max": "*"
        }
      },
      {
        "id": "Extension.extension:representation.extension:representation.url",
        "path": "Extension.extension.extension.url",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "fixedUri": "representation"
      },
      {
        "id": "Extension.extension:representation.extension:representation.value[x]",
        "path": "Extension.extension.extension.value[x]",
        "short": "The structural representation as text string in a format e.g. InChI, SMILES, MOLFILE, CDX",
        "definition": "The structural representation as text string in a format e.g. InChI, SMILES, MOLFILE, CDX.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "string"
          }
        ]
      },
      {
        "id": "Extension.extension:representation.extension:attachment",
        "path": "Extension.extension.extension",
        "sliceName": "attachment",
        "short": "R4: An attached file with the structural representation (new)",
        "definition": "R4: `SubstanceSpecification.structure.representation.attachment` (new:Attachment)",
        "comment": "Element `SubstanceSpecification.structure.representation.attachment` is part of an existing definition because parent element `SubstanceSpecification.structure.representation` requires a cross-version extension.\nElement `SubstanceSpecification.structure.representation.attachment` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.representation.attachment` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "requirements": "Element `SubstanceSpecification.structure.representation.attachment` is part of an existing definition because parent element `SubstanceSpecification.structure.representation` requires a cross-version extension.\nElement `SubstanceSpecification.structure.representation.attachment` is not mapped to FHIR STU3, since FHIR R4 `SubstanceSpecification` is not mapped.\nElement `SubstanceSpecification.structure.representation.attachment` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.extension",
          "min": 0,
          "max": "*"
        }
      },
      {
        "id": "Extension.extension:representation.extension:attachment.url",
        "path": "Extension.extension.extension.url",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "fixedUri": "attachment"
      },
      {
        "id": "Extension.extension:representation.extension:attachment.value[x]",
        "path": "Extension.extension.extension.value[x]",
        "short": "An attached file with the structural representation",
        "definition": "An attached file with the structural representation.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "Attachment"
          }
        ]
      },
      {
        "id": "Extension.extension:representation.url",
        "path": "Extension.extension.url",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "fixedUri": "representation"
      },
      {
        "id": "Extension.extension:representation.value[x]",
        "path": "Extension.extension.value[x]",
        "min": 0,
        "max": "0",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        }
      },
      {
        "id": "Extension.url",
        "path": "Extension.url",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "fixedUri": "http://hl7.org/fhir/4.0/StructureDefinition/extension-SubstanceSpecification.structure"
      },
      {
        "id": "Extension.value[x]",
        "path": "Extension.value[x]",
        "min": 0,
        "max": "0",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        }
      }
    ]
  }
}