Clinical Document Architecture, published by Health Level 7. This guide is not an authorized publication; it is the continuous build for version 2.0.1-sd built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/CDA-core-sd/ and changes regularly. See the Directory of published versions

• Content
• Detailed Descriptions
• Mappings
• XML
• JSON

Logical Model: Observation - XML Profile

XML representation of the Observation logical model.

Raw xml | Download

<StructureDefinition xmlns="http://hl7.org/fhir">
  <id value="Observation"/>
  <text>
    <status value="generated"/>
    <div xmlns="http://www.w3.org/1999/xhtml">
      <p>A derivative of the RIM Observation class, used for representing coded and other observations.</p>
      <p>Observation.negationInd, when set to &quot;true&quot;, is a positive assertion that the Observation as a whole is negated. Some properties such as Observation.id, Observation.moodCode, and the participations are not negated. These properties always have the same meaning: i.e., the author remains the author of the negative Observation. An observation statement with negationInd is still a statement about the specific fact described by the Observation. For instance, a negated &quot;finding of wheezing on July 1&quot; means that the author positively denies that there was wheezing on July 1, and that he takes the same responsibility for such statement and the same requirement to have evidence for such statement than if he had not used negation.</p>
    </div>
  </text>
  <extension
             url="http://hl7.org/fhir/tools/StructureDefinition/logical-target">
    <valueBoolean>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/data-absent-reason">
        <valueCode value="not-applicable"/>
      </extension>
    </valueBoolean>
  </extension>
  <extension
             url="http://hl7.org/fhir/tools/StructureDefinition/xml-namespace">
    <valueUri value="urn:hl7-org:v3"/>
  </extension>
  <extension url="http://hl7.org/fhir/tools/StructureDefinition/xml-name">
    <valueString value="observation"/>
  </extension>
  <extension
             url="http://hl7.org/fhir/tools/StructureDefinition/logical-container">
    <valueUri
              value="http://hl7.org/cda/stds/core/StructureDefinition/ClinicalDocument"/>
  </extension>
  <extension
             url="http://hl7.org/fhir/tools/StructureDefinition/type-profile-style">
    <valueUri value="cda"/>
  </extension>
  <url value="http://hl7.org/cda/stds/core/StructureDefinition/Observation"/>
  <version value="2.0.1-sd"/>
  <name value="Observation"/>
  <title value="Observation (CDA Class)"/>
  <status value="active"/>
  <experimental value="false"/>
  <date value="2024-12-18T02:39:25+00:00"/>
  <publisher value="Health Level 7"/>
  <contact>
    <name value="HL7 International - Structured Documents"/>
    <telecom>
      <system value="url"/>
      <value value="http://www.hl7.org/Special/committees/structure"/>
    </telecom>
    <telecom>
      <system value="email"/>
      <value value="structdog@lists.HL7.org"/>
    </telecom>
  </contact>
  <description
               value="A derivative of the RIM Observation class, used for representing coded and other observations.

Observation.negationInd, when set to &quot;true&quot;, is a positive assertion that the Observation as a whole is negated. Some properties such as Observation.id, Observation.moodCode, and the participations are not negated. These properties always have the same meaning: i.e., the author remains the author of the negative Observation. An observation statement with negationInd is still a statement about the specific fact described by the Observation. For instance, a negated &quot;finding of wheezing on July 1&quot; means that the author positively denies that there was wheezing on July 1, and that he takes the same responsibility for such statement and the same requirement to have evidence for such statement than if he had not used negation."/>
  <fhirVersion value="5.0.0"/>
  <mapping>
    <identity value="rim"/>
    <uri value="http://hl7.org/v3"/>
    <name value="RIM Mapping"/>
  </mapping>
  <kind value="logical"/>
  <abstract value="false"/>
  <type value="http://hl7.org/cda/stds/core/StructureDefinition/Observation"/>
  <baseDefinition
                  value="http://hl7.org/cda/stds/core/StructureDefinition/InfrastructureRoot"/>
  <derivation value="specialization"/>
  <snapshot>
    <element id="Observation">
      <path value="Observation"/>
      <short value="Base for all types and resources"/>
      <definition
                  value="Defines the basic properties of every data value. This is an abstract type, meaning that no value can be just a data value without belonging to any concrete type. Every concrete type is a specialization of this general abstract DataValue type."/>
      <min value="1"/>
      <max value="1"/>
      <base>
        <path value="Base"/>
        <min value="0"/>
        <max value="*"/>
      </base>
      <isModifier value="false"/>
      <mapping>
        <identity value="rim"/>
        <map value="n/a"/>
      </mapping>
    </element>
    <element id="Observation.nullFlavor">
      <path value="Observation.nullFlavor"/>
      <representation value="xmlAttr"/>
      <label value="Exceptional Value Detail"/>
      <definition
                  value="If a value is an exceptional value (NULL-value), this specifies in what way and why proper information is missing."/>
      <min value="0"/>
      <max value="1"/>
      <base>
        <path value="ANY.nullFlavor"/>
        <min value="0"/>
        <max value="1"/>
      </base>
      <type>
        <code value="code"/>
        <profile
                 value="http://hl7.org/cda/stds/core/StructureDefinition/cs-simple"/>
      </type>
      <binding>
        <strength value="required"/>
        <valueSet
                  value="http://hl7.org/cda/stds/core/ValueSet/CDANullFlavor"/>
      </binding>
    </element>
    <element id="Observation.realmCode">
      <path value="Observation.realmCode"/>
      <definition
                  value="When valued in an instance, this attribute signals the imposition of realm-specific constraints. The value of this attribute identifies the realm in question"/>
      <min value="0"/>
      <max value="*"/>
      <base>
        <path value="InfrastructureRoot.realmCode"/>
        <min value="0"/>
        <max value="*"/>
      </base>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/CS"/>
      </type>
    </element>
    <element id="Observation.typeId">
      <path value="Observation.typeId"/>
      <definition
                  value="When valued in an instance, this attribute signals the imposition of constraints defined in an HL7-specified message type. This might be a common type (also known as CMET in the messaging communication environment), or content included within a wrapper. The value of this attribute provides a unique identifier for the type in question."/>
      <min value="0"/>
      <max value="1"/>
      <base>
        <path value="InfrastructureRoot.typeId"/>
        <min value="0"/>
        <max value="1"/>
      </base>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/II"/>
      </type>
      <constraint>
        <key value="II-1"/>
        <severity value="error"/>
        <human
               value="An II instance must have either a root or an nullFlavor."/>
        <expression value="root.exists() or nullFlavor.exists()"/>
        <source
                value="http://hl7.org/cda/stds/core/StructureDefinition/InfrastructureRoot"/>
      </constraint>
    </element>
    <element id="Observation.typeId.nullFlavor">
      <path value="Observation.typeId.nullFlavor"/>
      <representation value="xmlAttr"/>
      <label value="Exceptional Value Detail"/>
      <definition
                  value="If a value is an exceptional value (NULL-value), this specifies in what way and why proper information is missing."/>
      <min value="0"/>
      <max value="1"/>
      <base>
        <path value="ANY.nullFlavor"/>
        <min value="0"/>
        <max value="1"/>
      </base>
      <type>
        <code value="code"/>
        <profile
                 value="http://hl7.org/cda/stds/core/StructureDefinition/cs-simple"/>
      </type>
      <binding>
        <strength value="required"/>
        <valueSet
                  value="http://hl7.org/cda/stds/core/ValueSet/CDANullFlavor"/>
      </binding>
    </element>
    <element id="Observation.typeId.assigningAuthorityName">
      <path value="Observation.typeId.assigningAuthorityName"/>
      <representation value="xmlAttr"/>
      <label value="Assigning Authority Name"/>
      <definition
                  value="A human readable name or mnemonic for the assigning authority. The Assigning Authority Name has no computational value. The purpose of a Assigning Authority Name is to assist an unaided human interpreter of an II value to interpret the authority. Note: no automated processing must depend on the assigning authority name to be present in any form."/>
      <min value="0"/>
      <max value="1"/>
      <base>
        <path value="II.assigningAuthorityName"/>
        <min value="0"/>
        <max value="1"/>
      </base>
      <type>
        <code value="string"/>
        <profile
                 value="http://hl7.org/cda/stds/core/StructureDefinition/st-simple"/>
      </type>
    </element>
    <element id="Observation.typeId.displayable">
      <path value="Observation.typeId.displayable"/>
      <representation value="xmlAttr"/>
      <label value="Displayable"/>
      <definition
                  value="Specifies if the identifier is intended for human display and data entry (displayable = true) as opposed to pure machine interoperation (displayable = false)."/>
      <min value="0"/>
      <max value="1"/>
      <base>
        <path value="II.displayable"/>
        <min value="0"/>
        <max value="1"/>
      </base>
      <type>
        <code value="boolean"/>
        <profile
                 value="http://hl7.org/cda/stds/core/StructureDefinition/bl-simple"/>
      </type>
    </element>
    <element id="Observation.typeId.root">
      <path value="Observation.typeId.root"/>
      <representation value="xmlAttr"/>
      <label value="Root"/>
      <definition value="Identifies the type as an HL7 Registered model"/>
      <min value="1"/>
      <max value="1"/>
      <base>
        <path value="II.root"/>
        <min value="0"/>
        <max value="1"/>
      </base>
      <type>
        <code value="string"/>
        <profile
                 value="http://hl7.org/cda/stds/core/StructureDefinition/oid"/>
        <profile
                 value="http://hl7.org/cda/stds/core/StructureDefinition/uuid"/>
        <profile
                 value="http://hl7.org/cda/stds/core/StructureDefinition/ruid"/>
      </type>
      <fixedString value="2.16.840.1.113883.1.3"/>
    </element>
    <element id="Observation.typeId.extension">
      <path value="Observation.typeId.extension"/>
      <representation value="xmlAttr"/>
      <label value="Extension"/>
      <definition
                  value="A character string as a unique identifier within the scope of the identifier root."/>
      <min value="1"/>
      <max value="1"/>
      <base>
        <path value="II.extension"/>
        <min value="0"/>
        <max value="1"/>
      </base>
      <type>
        <code value="string"/>
        <profile
                 value="http://hl7.org/cda/stds/core/StructureDefinition/st-simple"/>
      </type>
    </element>
    <element id="Observation.templateId">
      <path value="Observation.templateId"/>
      <definition
                  value="When valued in an instance, this attribute signals the imposition of a set of template-defined constraints. The value of this attribute provides a unique identifier for the templates in question"/>
      <min value="0"/>
      <max value="*"/>
      <base>
        <path value="InfrastructureRoot.templateId"/>
        <min value="0"/>
        <max value="*"/>
      </base>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/II"/>
      </type>
    </element>
    <element id="Observation.classCode">
      <path value="Observation.classCode"/>
      <representation value="xmlAttr"/>
      <min value="1"/>
      <max value="1"/>
      <base>
        <path value="Observation.classCode"/>
        <min value="1"/>
        <max value="1"/>
      </base>
      <type>
        <code value="code"/>
        <profile
                 value="http://hl7.org/cda/stds/core/StructureDefinition/cs-simple"/>
      </type>
      <binding>
        <strength value="required"/>
        <valueSet
                  value="http://hl7.org/cda/stds/core/ValueSet/CDAActClassObservation"/>
      </binding>
    </element>
    <element id="Observation.moodCode">
      <path value="Observation.moodCode"/>
      <representation value="xmlAttr"/>
      <min value="1"/>
      <max value="1"/>
      <base>
        <path value="Observation.moodCode"/>
        <min value="1"/>
        <max value="1"/>
      </base>
      <type>
        <code value="code"/>
        <profile
                 value="http://hl7.org/cda/stds/core/StructureDefinition/cs-simple"/>
      </type>
      <binding>
        <strength value="required"/>
        <valueSet
                  value="http://terminology.hl7.org/ValueSet/v3-xActMoodDocumentObservation|2.0.0"/>
      </binding>
    </element>
    <element id="Observation.negationInd">
      <path value="Observation.negationInd"/>
      <representation value="xmlAttr"/>
      <min value="0"/>
      <max value="1"/>
      <base>
        <path value="Observation.negationInd"/>
        <min value="0"/>
        <max value="1"/>
      </base>
      <type>
        <code value="boolean"/>
        <profile
                 value="http://hl7.org/cda/stds/core/StructureDefinition/bl-simple"/>
      </type>
    </element>
    <element id="Observation.id">
      <path value="Observation.id"/>
      <min value="0"/>
      <max value="*"/>
      <base>
        <path value="Observation.id"/>
        <min value="0"/>
        <max value="*"/>
      </base>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/II"/>
      </type>
    </element>
    <element id="Observation.sdtcCategory">
      <extension
                 url="http://hl7.org/fhir/tools/StructureDefinition/xml-namespace">
        <valueUri value="urn:hl7-org:sdtc"/>
      </extension>
      <extension
                 url="http://hl7.org/fhir/tools/StructureDefinition/xml-name">
        <valueString value="category"/>
      </extension>
      <path value="Observation.sdtcCategory"/>
      <min value="0"/>
      <max value="*"/>
      <base>
        <path value="Observation.sdtcCategory"/>
        <min value="0"/>
        <max value="*"/>
      </base>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/CD"/>
      </type>
    </element>
    <element id="Observation.code">
      <path value="Observation.code"/>
      <representation value="typeAttr"/>
      <min value="1"/>
      <max value="1"/>
      <base>
        <path value="Observation.code"/>
        <min value="1"/>
        <max value="1"/>
      </base>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/CD"/>
      </type>
      <binding>
        <strength value="example"/>
        <valueSet
                  value="http://terminology.hl7.org/ValueSet/v3-ObservationType"/>
      </binding>
    </element>
    <element id="Observation.derivationExpr">
      <path value="Observation.derivationExpr"/>
      <min value="0"/>
      <max value="1"/>
      <base>
        <path value="Observation.derivationExpr"/>
        <min value="0"/>
        <max value="1"/>
      </base>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/ST"/>
      </type>
    </element>
    <element id="Observation.text">
      <path value="Observation.text"/>
      <representation value="typeAttr"/>
      <min value="0"/>
      <max value="1"/>
      <base>
        <path value="Observation.text"/>
        <min value="0"/>
        <max value="1"/>
      </base>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/ED"/>
      </type>
    </element>
    <element id="Observation.statusCode">
      <path value="Observation.statusCode"/>
      <min value="0"/>
      <max value="1"/>
      <base>
        <path value="Observation.statusCode"/>
        <min value="0"/>
        <max value="1"/>
      </base>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/CS"/>
      </type>
      <binding>
        <strength value="required"/>
        <valueSet value="http://terminology.hl7.org/ValueSet/v3-ActStatus"/>
      </binding>
    </element>
    <element id="Observation.effectiveTime">
      <path value="Observation.effectiveTime"/>
      <min value="0"/>
      <max value="1"/>
      <base>
        <path value="Observation.effectiveTime"/>
        <min value="0"/>
        <max value="1"/>
      </base>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/IVL-TS"/>
      </type>
    </element>
    <element id="Observation.priorityCode">
      <path value="Observation.priorityCode"/>
      <min value="0"/>
      <max value="1"/>
      <base>
        <path value="Observation.priorityCode"/>
        <min value="0"/>
        <max value="1"/>
      </base>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/CE"/>
      </type>
      <binding>
        <strength value="example"/>
        <valueSet value="http://terminology.hl7.org/ValueSet/v3-ActPriority"/>
      </binding>
    </element>
    <element id="Observation.repeatNumber">
      <path value="Observation.repeatNumber"/>
      <min value="0"/>
      <max value="1"/>
      <base>
        <path value="Observation.repeatNumber"/>
        <min value="0"/>
        <max value="1"/>
      </base>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/IVL-INT"/>
      </type>
    </element>
    <element id="Observation.languageCode">
      <path value="Observation.languageCode"/>
      <min value="0"/>
      <max value="1"/>
      <base>
        <path value="Observation.languageCode"/>
        <min value="0"/>
        <max value="1"/>
      </base>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/CS"/>
      </type>
      <binding>
        <strength value="required"/>
        <valueSet value="http://hl7.org/fhir/ValueSet/all-languages"/>
      </binding>
    </element>
    <element id="Observation.value">
      <path value="Observation.value"/>
      <representation value="typeAttr"/>
      <min value="0"/>
      <max value="*"/>
      <base>
        <path value="Observation.value"/>
        <min value="0"/>
        <max value="*"/>
      </base>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/ANY"/>
      </type>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/BL"/>
      </type>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/ED"/>
      </type>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/ST"/>
      </type>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/CD"/>
      </type>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/CV"/>
      </type>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/CE"/>
      </type>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/CO"/>
      </type>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/SC"/>
      </type>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/II"/>
      </type>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/TEL"/>
      </type>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/AD"/>
      </type>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/EN"/>
      </type>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/INT"/>
      </type>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/REAL"/>
      </type>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/PQ"/>
      </type>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/MO"/>
      </type>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/TS"/>
      </type>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/IVL-PQ"/>
      </type>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/IVL-TS"/>
      </type>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/PIVL-TS"/>
      </type>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/EIVL-TS"/>
      </type>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/SXPR-TS"/>
      </type>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/RTO-PQ-PQ"/>
      </type>
    </element>
    <element id="Observation.interpretationCode">
      <path value="Observation.interpretationCode"/>
      <min value="0"/>
      <max value="*"/>
      <base>
        <path value="Observation.interpretationCode"/>
        <min value="0"/>
        <max value="*"/>
      </base>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/CE"/>
      </type>
      <binding>
        <strength value="required"/>
        <valueSet
                  value="http://hl7.org/cda/stds/core/ValueSet/CDAObservationInterpretation"/>
      </binding>
    </element>
    <element id="Observation.methodCode">
      <path value="Observation.methodCode"/>
      <min value="0"/>
      <max value="*"/>
      <base>
        <path value="Observation.methodCode"/>
        <min value="0"/>
        <max value="*"/>
      </base>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/CE"/>
      </type>
      <binding>
        <strength value="example"/>
        <valueSet
                  value="http://terminology.hl7.org/ValueSet/v3-ObservationMethod"/>
      </binding>
    </element>
    <element id="Observation.targetSiteCode">
      <path value="Observation.targetSiteCode"/>
      <definition value="Drawn from concept domain ActSite"/>
      <min value="0"/>
      <max value="*"/>
      <base>
        <path value="Observation.targetSiteCode"/>
        <min value="0"/>
        <max value="*"/>
      </base>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/CD"/>
      </type>
    </element>
    <element id="Observation.subject">
      <path value="Observation.subject"/>
      <min value="0"/>
      <max value="1"/>
      <base>
        <path value="Observation.subject"/>
        <min value="0"/>
        <max value="1"/>
      </base>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/Subject"/>
      </type>
    </element>
    <element id="Observation.specimen">
      <path value="Observation.specimen"/>
      <min value="0"/>
      <max value="*"/>
      <base>
        <path value="Observation.specimen"/>
        <min value="0"/>
        <max value="*"/>
      </base>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/Specimen"/>
      </type>
    </element>
    <element id="Observation.performer">
      <path value="Observation.performer"/>
      <min value="0"/>
      <max value="*"/>
      <base>
        <path value="Observation.performer"/>
        <min value="0"/>
        <max value="*"/>
      </base>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/Performer2"/>
      </type>
    </element>
    <element id="Observation.author">
      <path value="Observation.author"/>
      <min value="0"/>
      <max value="*"/>
      <base>
        <path value="Observation.author"/>
        <min value="0"/>
        <max value="*"/>
      </base>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/Author"/>
      </type>
    </element>
    <element id="Observation.informant">
      <path value="Observation.informant"/>
      <min value="0"/>
      <max value="*"/>
      <base>
        <path value="Observation.informant"/>
        <min value="0"/>
        <max value="*"/>
      </base>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/Informant"/>
      </type>
    </element>
    <element id="Observation.participant">
      <path value="Observation.participant"/>
      <min value="0"/>
      <max value="*"/>
      <base>
        <path value="Observation.participant"/>
        <min value="0"/>
        <max value="*"/>
      </base>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/Participant2"/>
      </type>
    </element>
    <element id="Observation.entryRelationship">
      <path value="Observation.entryRelationship"/>
      <min value="0"/>
      <max value="*"/>
      <base>
        <path value="Observation.entryRelationship"/>
        <min value="0"/>
        <max value="*"/>
      </base>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/EntryRelationship"/>
      </type>
    </element>
    <element id="Observation.reference">
      <path value="Observation.reference"/>
      <min value="0"/>
      <max value="*"/>
      <base>
        <path value="Observation.reference"/>
        <min value="0"/>
        <max value="*"/>
      </base>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/Reference"/>
      </type>
    </element>
    <element id="Observation.precondition">
      <path value="Observation.precondition"/>
      <min value="0"/>
      <max value="*"/>
      <base>
        <path value="Observation.precondition"/>
        <min value="0"/>
        <max value="*"/>
      </base>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/Precondition"/>
      </type>
    </element>
    <element id="Observation.sdtcPrecondition2">
      <extension
                 url="http://hl7.org/fhir/tools/StructureDefinition/xml-namespace">
        <valueUri value="urn:hl7-org:sdtc"/>
      </extension>
      <extension
                 url="http://hl7.org/fhir/tools/StructureDefinition/xml-name">
        <valueString value="precondition2"/>
      </extension>
      <path value="Observation.sdtcPrecondition2"/>
      <min value="0"/>
      <max value="*"/>
      <base>
        <path value="Observation.sdtcPrecondition2"/>
        <min value="0"/>
        <max value="*"/>
      </base>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/Precondition2"/>
      </type>
    </element>
    <element id="Observation.referenceRange">
      <path value="Observation.referenceRange"/>
      <definition
                  value="Relates an Observation to the ObservationRange class, where the expected range of values for a particular observation can be specified."/>
      <min value="0"/>
      <max value="*"/>
      <base>
        <path value="Observation.referenceRange"/>
        <min value="0"/>
        <max value="*"/>
      </base>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/InfrastructureRoot"/>
      </type>
    </element>
    <element id="Observation.referenceRange.nullFlavor">
      <path value="Observation.referenceRange.nullFlavor"/>
      <representation value="xmlAttr"/>
      <label value="Exceptional Value Detail"/>
      <definition
                  value="If a value is an exceptional value (NULL-value), this specifies in what way and why proper information is missing."/>
      <min value="0"/>
      <max value="1"/>
      <base>
        <path value="ANY.nullFlavor"/>
        <min value="0"/>
        <max value="1"/>
      </base>
      <type>
        <code value="code"/>
        <profile
                 value="http://hl7.org/cda/stds/core/StructureDefinition/cs-simple"/>
      </type>
      <binding>
        <strength value="required"/>
        <valueSet
                  value="http://hl7.org/cda/stds/core/ValueSet/CDANullFlavor"/>
      </binding>
    </element>
    <element id="Observation.referenceRange.realmCode">
      <path value="Observation.referenceRange.realmCode"/>
      <definition
                  value="When valued in an instance, this attribute signals the imposition of realm-specific constraints. The value of this attribute identifies the realm in question"/>
      <min value="0"/>
      <max value="*"/>
      <base>
        <path value="InfrastructureRoot.realmCode"/>
        <min value="0"/>
        <max value="*"/>
      </base>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/CS"/>
      </type>
    </element>
    <element id="Observation.referenceRange.typeId">
      <path value="Observation.referenceRange.typeId"/>
      <definition
                  value="When valued in an instance, this attribute signals the imposition of constraints defined in an HL7-specified message type. This might be a common type (also known as CMET in the messaging communication environment), or content included within a wrapper. The value of this attribute provides a unique identifier for the type in question."/>
      <min value="0"/>
      <max value="1"/>
      <base>
        <path value="InfrastructureRoot.typeId"/>
        <min value="0"/>
        <max value="1"/>
      </base>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/II"/>
      </type>
      <constraint>
        <key value="II-1"/>
        <severity value="error"/>
        <human
               value="An II instance must have either a root or an nullFlavor."/>
        <expression value="root.exists() or nullFlavor.exists()"/>
      </constraint>
    </element>
    <element id="Observation.referenceRange.typeId.nullFlavor">
      <path value="Observation.referenceRange.typeId.nullFlavor"/>
      <representation value="xmlAttr"/>
      <label value="Exceptional Value Detail"/>
      <definition
                  value="If a value is an exceptional value (NULL-value), this specifies in what way and why proper information is missing."/>
      <min value="0"/>
      <max value="1"/>
      <base>
        <path value="ANY.nullFlavor"/>
        <min value="0"/>
        <max value="1"/>
      </base>
      <type>
        <code value="code"/>
        <profile
                 value="http://hl7.org/cda/stds/core/StructureDefinition/cs-simple"/>
      </type>
      <binding>
        <strength value="required"/>
        <valueSet
                  value="http://hl7.org/cda/stds/core/ValueSet/CDANullFlavor"/>
      </binding>
    </element>
    <element id="Observation.referenceRange.typeId.assigningAuthorityName">
      <path value="Observation.referenceRange.typeId.assigningAuthorityName"/>
      <representation value="xmlAttr"/>
      <label value="Assigning Authority Name"/>
      <definition
                  value="A human readable name or mnemonic for the assigning authority. The Assigning Authority Name has no computational value. The purpose of a Assigning Authority Name is to assist an unaided human interpreter of an II value to interpret the authority. Note: no automated processing must depend on the assigning authority name to be present in any form."/>
      <min value="0"/>
      <max value="1"/>
      <base>
        <path value="II.assigningAuthorityName"/>
        <min value="0"/>
        <max value="1"/>
      </base>
      <type>
        <code value="string"/>
        <profile
                 value="http://hl7.org/cda/stds/core/StructureDefinition/st-simple"/>
      </type>
    </element>
    <element id="Observation.referenceRange.typeId.displayable">
      <path value="Observation.referenceRange.typeId.displayable"/>
      <representation value="xmlAttr"/>
      <label value="Displayable"/>
      <definition
                  value="Specifies if the identifier is intended for human display and data entry (displayable = true) as opposed to pure machine interoperation (displayable = false)."/>
      <min value="0"/>
      <max value="1"/>
      <base>
        <path value="II.displayable"/>
        <min value="0"/>
        <max value="1"/>
      </base>
      <type>
        <code value="boolean"/>
        <profile
                 value="http://hl7.org/cda/stds/core/StructureDefinition/bl-simple"/>
      </type>
    </element>
    <element id="Observation.referenceRange.typeId.root">
      <path value="Observation.referenceRange.typeId.root"/>
      <representation value="xmlAttr"/>
      <label value="Root"/>
      <definition value="Identifies the type as an HL7 Registered model"/>
      <min value="1"/>
      <max value="1"/>
      <base>
        <path value="II.root"/>
        <min value="0"/>
        <max value="1"/>
      </base>
      <type>
        <code value="string"/>
        <profile
                 value="http://hl7.org/cda/stds/core/StructureDefinition/oid"/>
        <profile
                 value="http://hl7.org/cda/stds/core/StructureDefinition/uuid"/>
        <profile
                 value="http://hl7.org/cda/stds/core/StructureDefinition/ruid"/>
      </type>
      <fixedString value="2.16.840.1.113883.1.3"/>
    </element>
    <element id="Observation.referenceRange.typeId.extension">
      <path value="Observation.referenceRange.typeId.extension"/>
      <representation value="xmlAttr"/>
      <label value="Extension"/>
      <definition
                  value="A character string as a unique identifier within the scope of the identifier root."/>
      <min value="1"/>
      <max value="1"/>
      <base>
        <path value="II.extension"/>
        <min value="0"/>
        <max value="1"/>
      </base>
      <type>
        <code value="string"/>
        <profile
                 value="http://hl7.org/cda/stds/core/StructureDefinition/st-simple"/>
      </type>
    </element>
    <element id="Observation.referenceRange.templateId">
      <path value="Observation.referenceRange.templateId"/>
      <definition
                  value="When valued in an instance, this attribute signals the imposition of a set of template-defined constraints. The value of this attribute provides a unique identifier for the templates in question"/>
      <min value="0"/>
      <max value="*"/>
      <base>
        <path value="InfrastructureRoot.templateId"/>
        <min value="0"/>
        <max value="*"/>
      </base>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/II"/>
      </type>
    </element>
    <element id="Observation.referenceRange.typeCode">
      <path value="Observation.referenceRange.typeCode"/>
      <representation value="xmlAttr"/>
      <min value="0"/>
      <max value="1"/>
      <base>
        <path value="Observation.referenceRange.typeCode"/>
        <min value="0"/>
        <max value="1"/>
      </base>
      <type>
        <code value="code"/>
        <profile
                 value="http://hl7.org/cda/stds/core/StructureDefinition/cs-simple"/>
      </type>
      <fixedCode value="REFV"/>
      <binding>
        <strength value="required"/>
        <valueSet
                  value="http://hl7.org/cda/stds/core/ValueSet/CDAActRelationshipType"/>
      </binding>
    </element>
    <element id="Observation.referenceRange.observationRange">
      <path value="Observation.referenceRange.observationRange"/>
      <min value="1"/>
      <max value="1"/>
      <base>
        <path value="Observation.referenceRange.observationRange"/>
        <min value="1"/>
        <max value="1"/>
      </base>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/ObservationRange"/>
      </type>
    </element>
    <element id="Observation.sdtcInFulfillmentOf1">
      <extension
                 url="http://hl7.org/fhir/tools/StructureDefinition/xml-namespace">
        <valueUri value="urn:hl7-org:sdtc"/>
      </extension>
      <extension
                 url="http://hl7.org/fhir/tools/StructureDefinition/xml-name">
        <valueString value="inFulfillmentOf1"/>
      </extension>
      <path value="Observation.sdtcInFulfillmentOf1"/>
      <min value="0"/>
      <max value="*"/>
      <base>
        <path value="Observation.sdtcInFulfillmentOf1"/>
        <min value="0"/>
        <max value="*"/>
      </base>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/InFulfillmentOf1"/>
      </type>
    </element>
  </snapshot>
  <differential>
    <element id="Observation">
      <path value="Observation"/>
      <min value="1"/>
      <max value="1"/>
    </element>
    <element id="Observation.classCode">
      <path value="Observation.classCode"/>
      <representation value="xmlAttr"/>
      <min value="1"/>
      <max value="1"/>
      <type>
        <code value="code"/>
        <profile
                 value="http://hl7.org/cda/stds/core/StructureDefinition/cs-simple"/>
      </type>
      <binding>
        <strength value="required"/>
        <valueSet
                  value="http://hl7.org/cda/stds/core/ValueSet/CDAActClassObservation"/>
      </binding>
    </element>
    <element id="Observation.moodCode">
      <path value="Observation.moodCode"/>
      <representation value="xmlAttr"/>
      <min value="1"/>
      <max value="1"/>
      <type>
        <code value="code"/>
        <profile
                 value="http://hl7.org/cda/stds/core/StructureDefinition/cs-simple"/>
      </type>
      <binding>
        <strength value="required"/>
        <valueSet
                  value="http://terminology.hl7.org/ValueSet/v3-xActMoodDocumentObservation|2.0.0"/>
      </binding>
    </element>
    <element id="Observation.negationInd">
      <path value="Observation.negationInd"/>
      <representation value="xmlAttr"/>
      <min value="0"/>
      <max value="1"/>
      <type>
        <code value="boolean"/>
        <profile
                 value="http://hl7.org/cda/stds/core/StructureDefinition/bl-simple"/>
      </type>
    </element>
    <element id="Observation.id">
      <path value="Observation.id"/>
      <min value="0"/>
      <max value="*"/>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/II"/>
      </type>
    </element>
    <element id="Observation.sdtcCategory">
      <extension
                 url="http://hl7.org/fhir/tools/StructureDefinition/xml-namespace">
        <valueUri value="urn:hl7-org:sdtc"/>
      </extension>
      <extension
                 url="http://hl7.org/fhir/tools/StructureDefinition/xml-name">
        <valueString value="category"/>
      </extension>
      <path value="Observation.sdtcCategory"/>
      <min value="0"/>
      <max value="*"/>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/CD"/>
      </type>
    </element>
    <element id="Observation.code">
      <path value="Observation.code"/>
      <representation value="typeAttr"/>
      <min value="1"/>
      <max value="1"/>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/CD"/>
      </type>
      <binding>
        <strength value="example"/>
        <valueSet
                  value="http://terminology.hl7.org/ValueSet/v3-ObservationType"/>
      </binding>
    </element>
    <element id="Observation.derivationExpr">
      <path value="Observation.derivationExpr"/>
      <min value="0"/>
      <max value="1"/>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/ST"/>
      </type>
    </element>
    <element id="Observation.text">
      <path value="Observation.text"/>
      <representation value="typeAttr"/>
      <min value="0"/>
      <max value="1"/>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/ED"/>
      </type>
    </element>
    <element id="Observation.statusCode">
      <path value="Observation.statusCode"/>
      <min value="0"/>
      <max value="1"/>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/CS"/>
      </type>
      <binding>
        <strength value="required"/>
        <valueSet value="http://terminology.hl7.org/ValueSet/v3-ActStatus"/>
      </binding>
    </element>
    <element id="Observation.effectiveTime">
      <path value="Observation.effectiveTime"/>
      <min value="0"/>
      <max value="1"/>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/IVL-TS"/>
      </type>
    </element>
    <element id="Observation.priorityCode">
      <path value="Observation.priorityCode"/>
      <min value="0"/>
      <max value="1"/>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/CE"/>
      </type>
      <binding>
        <strength value="example"/>
        <valueSet value="http://terminology.hl7.org/ValueSet/v3-ActPriority"/>
      </binding>
    </element>
    <element id="Observation.repeatNumber">
      <path value="Observation.repeatNumber"/>
      <min value="0"/>
      <max value="1"/>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/IVL-INT"/>
      </type>
    </element>
    <element id="Observation.languageCode">
      <path value="Observation.languageCode"/>
      <min value="0"/>
      <max value="1"/>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/CS"/>
      </type>
      <binding>
        <strength value="required"/>
        <valueSet value="http://hl7.org/fhir/ValueSet/all-languages"/>
      </binding>
    </element>
    <element id="Observation.value">
      <path value="Observation.value"/>
      <representation value="typeAttr"/>
      <min value="0"/>
      <max value="*"/>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/ANY"/>
      </type>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/BL"/>
      </type>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/ED"/>
      </type>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/ST"/>
      </type>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/CD"/>
      </type>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/CV"/>
      </type>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/CE"/>
      </type>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/CO"/>
      </type>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/SC"/>
      </type>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/II"/>
      </type>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/TEL"/>
      </type>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/AD"/>
      </type>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/EN"/>
      </type>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/INT"/>
      </type>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/REAL"/>
      </type>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/PQ"/>
      </type>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/MO"/>
      </type>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/TS"/>
      </type>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/IVL-PQ"/>
      </type>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/IVL-TS"/>
      </type>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/PIVL-TS"/>
      </type>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/EIVL-TS"/>
      </type>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/SXPR-TS"/>
      </type>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/RTO-PQ-PQ"/>
      </type>
    </element>
    <element id="Observation.interpretationCode">
      <path value="Observation.interpretationCode"/>
      <min value="0"/>
      <max value="*"/>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/CE"/>
      </type>
      <binding>
        <strength value="required"/>
        <valueSet
                  value="http://hl7.org/cda/stds/core/ValueSet/CDAObservationInterpretation"/>
      </binding>
    </element>
    <element id="Observation.methodCode">
      <path value="Observation.methodCode"/>
      <min value="0"/>
      <max value="*"/>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/CE"/>
      </type>
      <binding>
        <strength value="example"/>
        <valueSet
                  value="http://terminology.hl7.org/ValueSet/v3-ObservationMethod"/>
      </binding>
    </element>
    <element id="Observation.targetSiteCode">
      <path value="Observation.targetSiteCode"/>
      <definition value="Drawn from concept domain ActSite"/>
      <min value="0"/>
      <max value="*"/>
      <type>
        <code value="http://hl7.org/cda/stds/core/StructureDefinition/CD"/>
      </type>
    </element>
    <element id="Observation.subject">
      <path value="Observation.subject"/>
      <min value="0"/>
      <max value="1"/>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/Subject"/>
      </type>
    </element>
    <element id="Observation.specimen">
      <path value="Observation.specimen"/>
      <min value="0"/>
      <max value="*"/>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/Specimen"/>
      </type>
    </element>
    <element id="Observation.performer">
      <path value="Observation.performer"/>
      <min value="0"/>
      <max value="*"/>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/Performer2"/>
      </type>
    </element>
    <element id="Observation.author">
      <path value="Observation.author"/>
      <min value="0"/>
      <max value="*"/>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/Author"/>
      </type>
    </element>
    <element id="Observation.informant">
      <path value="Observation.informant"/>
      <min value="0"/>
      <max value="*"/>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/Informant"/>
      </type>
    </element>
    <element id="Observation.participant">
      <path value="Observation.participant"/>
      <min value="0"/>
      <max value="*"/>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/Participant2"/>
      </type>
    </element>
    <element id="Observation.entryRelationship">
      <path value="Observation.entryRelationship"/>
      <min value="0"/>
      <max value="*"/>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/EntryRelationship"/>
      </type>
    </element>
    <element id="Observation.reference">
      <path value="Observation.reference"/>
      <min value="0"/>
      <max value="*"/>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/Reference"/>
      </type>
    </element>
    <element id="Observation.precondition">
      <path value="Observation.precondition"/>
      <min value="0"/>
      <max value="*"/>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/Precondition"/>
      </type>
    </element>
    <element id="Observation.sdtcPrecondition2">
      <extension
                 url="http://hl7.org/fhir/tools/StructureDefinition/xml-namespace">
        <valueUri value="urn:hl7-org:sdtc"/>
      </extension>
      <extension
                 url="http://hl7.org/fhir/tools/StructureDefinition/xml-name">
        <valueString value="precondition2"/>
      </extension>
      <path value="Observation.sdtcPrecondition2"/>
      <min value="0"/>
      <max value="*"/>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/Precondition2"/>
      </type>
    </element>
    <element id="Observation.referenceRange">
      <path value="Observation.referenceRange"/>
      <definition
                  value="Relates an Observation to the ObservationRange class, where the expected range of values for a particular observation can be specified."/>
      <min value="0"/>
      <max value="*"/>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/InfrastructureRoot"/>
      </type>
    </element>
    <element id="Observation.referenceRange.typeCode">
      <path value="Observation.referenceRange.typeCode"/>
      <representation value="xmlAttr"/>
      <min value="0"/>
      <max value="1"/>
      <type>
        <code value="code"/>
        <profile
                 value="http://hl7.org/cda/stds/core/StructureDefinition/cs-simple"/>
      </type>
      <fixedCode value="REFV"/>
      <binding>
        <strength value="required"/>
        <valueSet
                  value="http://hl7.org/cda/stds/core/ValueSet/CDAActRelationshipType"/>
      </binding>
    </element>
    <element id="Observation.referenceRange.observationRange">
      <path value="Observation.referenceRange.observationRange"/>
      <min value="1"/>
      <max value="1"/>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/ObservationRange"/>
      </type>
    </element>
    <element id="Observation.sdtcInFulfillmentOf1">
      <extension
                 url="http://hl7.org/fhir/tools/StructureDefinition/xml-namespace">
        <valueUri value="urn:hl7-org:sdtc"/>
      </extension>
      <extension
                 url="http://hl7.org/fhir/tools/StructureDefinition/xml-name">
        <valueString value="inFulfillmentOf1"/>
      </extension>
      <path value="Observation.sdtcInFulfillmentOf1"/>
      <min value="0"/>
      <max value="*"/>
      <type>
        <code
              value="http://hl7.org/cda/stds/core/StructureDefinition/InFulfillmentOf1"/>
      </type>
    </element>
  </differential>
</StructureDefinition>