HL7 FHIR® Implementation Guide: Electronic Case Reporting (eCR) - US Realm
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This page is part of the electronic Case Reporting (eCR) (v2.1.2: STU 2) based on FHIR (HL7® FHIR® Standard) R4. This is the current published version. For a full list of available versions, see the Directory of published versions

: Last Menstrual Period Example: observation-last-menstrual-period-eve-everywoman - XML Representation

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<Observation xmlns="http://hl7.org/fhir">
  <id value="observation-last-menstrual-period-eve-everywoman"/>
  <meta>
    <profile
             value="http://hl7.org/fhir/us/vr-common-library/StructureDefinition/Observation-last-menstrual-period"/>
  </meta>
  <text>
    <status value="generated"/>
    <div xmlns="http://www.w3.org/1999/xhtml"><p class="res-header-id"><b>Generated Narrative: Observation observation-last-menstrual-period-eve-everywoman</b></p><a name="observation-last-menstrual-period-eve-everywoman"> </a><a name="hcobservation-last-menstrual-period-eve-everywoman"> </a><a name="observation-last-menstrual-period-eve-everywoman-en-US"> </a><p><b>identifier</b>: <a href="http://terminology.hl7.org/6.0.2/NamingSystem-uri.html" title="As defined by RFC 3986 (http://www.ietf.org/rfc/rfc3986.txt)(with many schemes defined in many RFCs). For OIDs and UUIDs, use the URN form (urn:oid:(note: lowercase) and urn:uuid:). See http://www.ietf.org/rfc/rfc3001.txt and http://www.ietf.org/rfc/rfc4122.txt 

This oid is used as an identifier II.root to indicate the the extension is an absolute URI (technically, an IRI). Typically, this is used for OIDs and GUIDs. Note that when this OID is used with OIDs and GUIDs, the II.extension should start with urn:oid or urn:uuid: 

Note that this OID is created to aid with interconversion between CDA and FHIR - FHIR uses urn:ietf:rfc:3986 as equivalent to this OID. URIs as identifiers appear more commonly in FHIR.

This OID may also be used in CD.codeSystem.">Uniform Resource Identifier (URI)</a>/urn:uuid:5ffea0ae-9ae5-4313-956a-30219b4a6afa</p><p><b>status</b>: Final</p><p><b>code</b>: <span title="Codes:{http://loinc.org 8665-2}">Last menstrual period start date</span></p><p><b>subject</b>: <a href="Patient-patient-ecr-eve-everywoman.html">Eve Everywoman</a></p><p><b>effective</b>: 2018-01-05 10:15:00+1000</p><p><b>value</b>: 2017-08-01</p></div>
  </text>
  <identifier>
    <system value="urn:ietf:rfc:3986"/>
    <value value="urn:uuid:5ffea0ae-9ae5-4313-956a-30219b4a6afa"/>
  </identifier>
  <status value="final"/>
  <code>
    <coding>
      <system value="http://loinc.org"/>
      <code value="8665-2"/>
      <display value="Last menstrual period start date"/>
    </coding>
  </code>
  <subject>🔗 
    <reference value="Patient/patient-ecr-eve-everywoman"/>
    <display value="Eve Everywoman"/>
  </subject>
  <effectiveDateTime value="2018-01-05T10:15:00+10:00"/>
  <valueDateTime value="2017-08-01"/>
</Observation>