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FHIR IG Statistics: StructureDefinition/time-precision

Packagehl7.fhir.uv.extensions
TypeStructureDefinition
Idtime-precision
FHIR VersionR5
Sourcehttp://hl7.org/fhir/extensions/https://build.fhir.org/ig/HL7/fhir-extensions/StructureDefinition-time-precision.html
URLhttp://hl7.org/fhir/StructureDefinition/time-precision
Version5.3.0-ballot
Statusactive
Date2025-05-23
NameTimePrecision
TitleTime Precision
Realmuv
Authorityhl7
DescriptionSpecifies that the precision of the datetime, time, or instant value is less than what appears and indicates the actual level of precision. This extension is used when the precision of a datetime, time, or instant value is not conveyed by the value itself (e.g. the datetime value 2014-02-01T10:00:00Z has a precision of 'min' and actually represents "10:00" and unknown seconds on Feb 1, 2014.
TypeExtension
Kindcomplex-type

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Narrative

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Generated Narrative: StructureDefinition time-precision

NameFlagsCard.TypeDescription & Constraintsdoco
.. Extension 0..1ExtensionExplicit precision (h, min, s)
... extension 0..0
... url 1..1uri"http://hl7.org/fhir/StructureDefinition/time-precision"
... value[x] 1..1codeValue of extension
Binding: CommonUCUMCodesForTimeDuration (required): Time duration units

doco Documentation for this format

Source

{
  "resourceType": "StructureDefinition",
  "id": "time-precision",
  "text": {
    "status": "extensions",
    "div": "<!-- snip (see above) -->"
  },
  "extension": [
    {
      "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
      "valueCode": "fhir"
    },
    {
      "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
      "valueInteger": 1
    },
    {
      "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status",
      "valueCode": "trial-use"
    },
    {
      "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-type-characteristics",
      "valueCode": "can-bind"
    }
  ],
  "url": "http://hl7.org/fhir/StructureDefinition/time-precision",
  "version": "5.3.0-ballot",
  "name": "TimePrecision",
  "title": "Time Precision",
  "status": "active",
  "experimental": false,
  "date": "2025-05-23",
  "publisher": "HL7 International / FHIR Infrastructure",
  "contact": [
    {
      "telecom": [
        {
          "system": "url",
          "value": "http://www.hl7.org/Special/committees/fiwg"
        }
      ]
    }
  ],
  "description": "Specifies that the precision of the datetime, time, or instant value is less than what appears and indicates the actual level of precision. This extension is used when the precision of a datetime, time, or instant value is not conveyed by the value itself (e.g. the datetime value 2014-02-01T10:00:00Z has a precision of 'min' and actually represents \"10:00\" and unknown seconds on Feb 1, 2014.",
  "jurisdiction": [
    {
      "coding": [
        {
          "system": "http://unstats.un.org/unsd/methods/m49/m49.htm",
          "code": "001"
        }
      ]
    }
  ],
  "fhirVersion": "5.0.0",
  "mapping": [
    {
      "identity": "v2",
      "uri": "http://hl7.org/v2",
      "name": "HL7 v2 Mapping"
    },
    {
      "identity": "rim",
      "uri": "http://hl7.org/v3",
      "name": "RIM Mapping"
    }
  ],
  "kind": "complex-type",
  "abstract": false,
  "context": [
    {
      "type": "element",
      "expression": "instant"
    },
    {
      "type": "element",
      "expression": "dateTime"
    },
    {
      "type": "element",
      "expression": "time"
    }
  ],
  "type": "Extension",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Extension",
  "derivation": "constraint",
  "snapshot": {
    "extension": [
      {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/snapshot-base-version",
        "valueString": "5.0.0"
      }
    ],
    "element": [
      {
        "id": "Extension",
        "path": "Extension",
        "short": "Explicit precision (h, min, s)",
        "definition": "Specifies that the precision of the datetime or time value is less than what appears and indicates the actual level of precision. This extension is used when the precision of a datetime or time value is not conveyed by the value itself (e.g. the datetime value 2014 has a precision of 'min'; the datetime value 2014-02-01T10:00:00Z actually represents \"10:00\" and unknown seconds on Feb 1, 2014.",
        "comment": "There is no expectation that software comparing dates based on precisions will take this extension into account, though software is permitted to do so if it wishes.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension",
          "min": 0,
          "max": "*"
        },
        "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,
        "mapping": [
          {
            "identity": "v2",
            "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"
          }
        ],
        "condition": [
          "ele-1"
        ],
        "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": "Extension",
        "definition": "An Extension",
        "min": 0,
        "max": "0",
        "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
      },
      {
        "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/StructureDefinition/time-precision",
        "isModifier": false,
        "isSummary": false,
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.value[x]",
        "path": "Extension.value[x]",
        "short": "Value of extension",
        "definition": "Value of extension - must be one of a constrained set of the data types (see [Extensibility](http://hl7.org/fhir/R5/extensibility.html) for a list).",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "code"
          }
        ],
        "condition": [
          "ext-1"
        ],
        "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,
        "binding": {
          "extension": [
            {
              "url": "http://hl7.org/fhir/tools/StructureDefinition/binding-definition",
              "valueMarkdown": "Time duration units"
            },
            {
              "url": "http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName",
              "valueString": "TimeDuration"
            }
          ],
          "strength": "required",
          "description": "Time duration units",
          "valueSet": "http://hl7.org/fhir/ValueSet/time-duration-units"
        },
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      }
    ]
  },
  "differential": {
    "element": [
      {
        "id": "Extension",
        "path": "Extension",
        "short": "Explicit precision (h, min, s)",
        "definition": "Specifies that the precision of the datetime or time value is less than what appears and indicates the actual level of precision. This extension is used when the precision of a datetime or time value is not conveyed by the value itself (e.g. the datetime value 2014 has a precision of 'min'; the datetime value 2014-02-01T10:00:00Z actually represents \"10:00\" and unknown seconds on Feb 1, 2014.",
        "comment": "There is no expectation that software comparing dates based on precisions will take this extension into account, though software is permitted to do so if it wishes.",
        "min": 0,
        "max": "1",
        "mapping": [
          {
            "identity": "v2",
            "map": "N/A"
          },
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension",
        "path": "Extension.extension",
        "max": "0"
      },
      {
        "id": "Extension.url",
        "path": "Extension.url",
        "fixedUri": "http://hl7.org/fhir/StructureDefinition/time-precision"
      },
      {
        "id": "Extension.value[x]",
        "path": "Extension.value[x]",
        "min": 1,
        "type": [
          {
            "code": "code"
          }
        ],
        "binding": {
          "extension": [
            {
              "url": "http://hl7.org/fhir/tools/StructureDefinition/binding-definition",
              "valueMarkdown": "Time duration units"
            },
            {
              "url": "http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName",
              "valueString": "TimeDuration"
            }
          ],
          "strength": "required",
          "description": "Time duration units",
          "valueSet": "http://hl7.org/fhir/ValueSet/time-duration-units"
        }
      }
    ]
  }
}