FHIR IG Statistics: StructureDefinition/ext-R3-Observation.value

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Source

{
  "resourceType": "StructureDefinition",
  "id": "ext-R3-Observation.value",
  "url": "http://hl7.org/fhir/3.0/StructureDefinition/extension-Observation.value",
  "version": "0.0.1-snapshot-1",
  "name": "ext_R3_Observation_value",
  "title": "Cross-version Extension for R3.Observation.value[x] for use in FHIR R4B",
  "status": "draft",
  "experimental": false,
  "date": "2025-06-03T03:12:22.1487171+02:00",
  "description": "This cross-version extension represents Observation.value[x] from http://hl7.org/fhir/StructureDefinition/Observation|3.0.2 for use in FHIR R4B.",
  "fhirVersion": "4.3.0",
  "kind": "complex-type",
  "abstract": false,
  "context": [
    {
      "type": "element",
      "expression": "Observation.value[x]"
    }
  ],
  "type": "Extension",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Extension",
  "derivation": "constraint",
  "snapshot": {
    "element": [
      {
        "id": "Extension",
        "path": "Extension",
        "short": "Actual result",
        "definition": "The information determined as a result of making the observation, if the information has a simple value.",
        "comment": "`Observation.value[x]` maps to R4B `Observation.value[x]`. So is mapped as Equivalent.",
        "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 unless an empty Parameters resource",
            "expression": "hasValue() or (children().count() > id.count()) or $this is Parameters",
            "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()",
            "source": "http://hl7.org/fhir/StructureDefinition/Extension"
          }
        ],
        "isModifier": false,
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          },
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.id",
        "path": "Extension.id",
        "representation": [
          "xmlAttr"
        ],
        "short": "Unique id for inter-element referencing",
        "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": [
          {
            "extension": [
              {
                "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
                "valueUrl": "id"
              }
            ],
            "code": "http://hl7.org/fhirpath/System.String"
          }
        ],
        "isModifier": false,
        "isSummary": false,
        "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",
          "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. 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 can 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"
          }
        ],
        "constraint": [
          {
            "key": "ele-1",
            "severity": "error",
            "human": "All FHIR elements must have a @value or children",
            "expression": "hasValue() or (children().count() > id.count())",
            "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()",
            "source": "http://hl7.org/fhir/StructureDefinition/Extension"
          }
        ],
        "isModifier": false,
        "isSummary": false,
        "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": [
          {
            "extension": [
              {
                "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
                "valueUrl": "uri"
              }
            ],
            "code": "http://hl7.org/fhirpath/System.String"
          }
        ],
        "fixedUri": "http://hl7.org/fhir/3.0/StructureDefinition/extension-Observation.value",
        "isModifier": false,
        "isSummary": false,
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.value[x]",
        "path": "Extension.value[x]",
        "short": "Actual result",
        "definition": "The information determined as a result of making the observation, if the information has a simple value.",
        "comment": "`Observation.value[x]` maps to R4B `Observation.value[x]`. So is mapped as Equivalent.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "Quantity"
          },
          {
            "code": "CodeableConcept"
          },
          {
            "code": "string"
          },
          {
            "code": "boolean"
          },
          {
            "code": "Range"
          },
          {
            "code": "Ratio"
          },
          {
            "code": "SampledData"
          },
          {
            "code": "Attachment"
          },
          {
            "code": "time"
          },
          {
            "code": "dateTime"
          },
          {
            "code": "Period"
          }
        ],
        "constraint": [
          {
            "key": "ele-1",
            "severity": "error",
            "human": "All FHIR elements must have a @value or children",
            "expression": "hasValue() or (children().count() > id.count())",
            "source": "http://hl7.org/fhir/StructureDefinition/Element"
          }
        ],
        "isModifier": false,
        "isSummary": false,
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.url",
        "path": "Extension.url",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "fixedUri": "http://hl7.org/fhir/3.0/StructureDefinition/extension-Observation.value"
      }
    ]
  },
  "differential": {
    "element": [
      {
        "id": "Extension",
        "path": "Extension",
        "short": "Actual result",
        "definition": "The information determined as a result of making the observation, if the information has a simple value.",
        "comment": "`Observation.value[x]` maps to R4B `Observation.value[x]`. So is mapped as Equivalent.",
        "min": 0,
        "max": "1",
        "isModifier": false
      },
      {
        "id": "Extension.value[x]",
        "path": "Extension.value[x]",
        "short": "Actual result",
        "definition": "The information determined as a result of making the observation, if the information has a simple value.",
        "comment": "`Observation.value[x]` maps to R4B `Observation.value[x]`. So is mapped as Equivalent.",
        "base": {
          "path": "Extension.value[x]"
        },
        "type": [
          {
            "code": "Quantity"
          },
          {
            "code": "CodeableConcept"
          },
          {
            "code": "string"
          },
          {
            "code": "boolean"
          },
          {
            "code": "Range"
          },
          {
            "code": "Ratio"
          },
          {
            "code": "SampledData"
          },
          {
            "code": "Attachment"
          },
          {
            "code": "time"
          },
          {
            "code": "dateTime"
          },
          {
            "code": "Period"
          }
        ]
      },
      {
        "id": "Extension.url",
        "path": "Extension.url",
        "min": 1,
        "max": "1",
        "fixedUri": "http://hl7.org/fhir/3.0/StructureDefinition/extension-Observation.value"
      }
    ]
  }
}