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Source1

{
  "resourceType": "ValueSet",
  "id": "time-duration-units",
  "meta": {
    "profile": [
      "http://hl7.org/fhir/StructureDefinition/shareablevalueset"
    ]
  },
  "text": {
    "status": "generated",
    "div": "<!-- snip (see above) -->"
  },
  "extension": [
    {
      "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
      "valueCode": "fhir"
    },
    {
      "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status",
      "valueCode": "trial-use"
    },
    {
      "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
      "valueInteger": 1
    }
  ],
  "url": "http://hl7.org/fhir/ValueSet/time-duration-units",
  "version": "5.3.0-ballot-tc1",
  "name": "CommonUCUMCodesForTimeDuration",
  "title": "Common UCUM Codes for Time Duration",
  "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": "This value set includes all common UCUM codes used for Time Duration Units - 'a' (years), 'mo' (months), 'd' (days), 'h' (hours), 'min' (minutes), 's' (seconds), and 'ms' (milliseconds). NOTE: This value set is the same as the duration units value set, except that it does not include weeks, because weeks are not a valid precision for a datetime, time, or instant value.",
  "jurisdiction": [
    {
      "coding": [
        {
          "system": "http://unstats.un.org/unsd/methods/m49/m49.htm",
          "code": "001"
        }
      ]
    }
  ],
  "copyright": "The UCUM codes, UCUM table (regardless of format), and UCUM Specification are copyright © 1999-2009, Regenstrief Institute, Inc. and the Unified Codes for Units of Measures (UCUM) Organization. All rights reserved.",
  "compose": {
    "include": [
      {
        "system": "http://unitsofmeasure.org",
        "concept": [
          {
            "code": "ms",
            "display": "milliseconds"
          },
          {
            "code": "s",
            "display": "seconds"
          },
          {
            "code": "min",
            "display": "minutes"
          },
          {
            "code": "h",
            "display": "hours"
          },
          {
            "code": "d",
            "display": "days"
          },
          {
            "code": "mo",
            "display": "months"
          },
          {
            "code": "a",
            "display": "years"
          }
        ]
      }
    ]
  }
}