<StructureDefinition xmlns="http://hl7.org/fhir">
  <id value="spark671" />
  <meta>
    <versionId value="spark710" />
    <lastUpdated value="2015-10-02T14:29:08.14+00:00" />
  </meta>
  <url value="http://hl7.org/fhir/StructureDefinition/hspc-delta-flag" />
  <name value="Indicate the data value in the containing model is a change from a previous instance of the same model" />
  <display value="HSPC DeltaFlag Extension" />
  <status value="draft" />
  <publisher value="HSPC" />
  <contact>
    <telecom>
      <system value="other" />
      <value value="http://healthcaresoa.org" />
    </telecom>
  </contact>
  <date value="2015-02-18" />
  <description value="Takes a value from the valueset listed in the model to indicate the data value in the containing model is a change from a previous instance of the same model." />
  <kind value="datatype" />
  <constrainedType value="Extension" />
  <abstract value="false" />
  <contextType value="resource" />
  <context value="Observation" />
  <base value="http://hl7.org/fhir/StructureDefinition/Extension" />
  <snapshot>
    <element>
      <path value="Extension" />
      <short value="Indicate the data value in the containing model is a change from a previous instance of the same model" />
      <definition value="Takes a value from the valueset listed in the model to indicate the data value in the containing model is a change from a previous instance of the same model." />
      <comments value="This model is intended to constrain values from OBX-8 in a lab result HL7 message. Because OBX-8 is overloaded to contain multiple types of data, we need a way to tell which kind of code is sent (abnormal flag, delta flag, or ordinal interpretation." />
      <min value="0" />
      <max value="1" />
      <base>
        <path value="Extension" />
        <min value="0" />
        <max value="*" />
      </base>
      <type>
        <code value="Extension" />
      </type>
      <isModifier value="false" />
    </element>
    <element>
      <path value="Extension.id" />
      <representation value="xmlAttr" />
      <short value="xml:id (or equivalent in JSON)" />
      <definition value="unique id for the element within a resource (for internal references)." />
      <min value="0" />
      <max value="1" />
      <base>
        <path value="Extension.id" />
        <min value="0" />
        <max value="1" />
      </base>
      <type>
        <code value="id" />
      </type>
      <mapping>
        <identity value="rim" />
        <map value="n/a" />
      </mapping>
    </element>
    <element>
      <path value="Extension.extension" />
      <name value="extension" />
      <short value="Extension" />
      <definition value="An Extension" />
      <min value="0" />
      <max value="0" />
      <base>
        <path value="Extension.extension" />
        <min value="0" />
        <max value="*" />
      </base>
      <type>
        <code value="Extension" />
      </type>
    </element>
    <element>
      <path value="Extension.url" />
      <representation value="xmlAttr" />
      <short value="identifies the meaning of the extension" />
      <definition value="Source of the definition for the extension code - a logical name or a URL." />
      <min value="1" />
      <max value="1" />
      <base>
        <path value="Extension.url" />
        <min value="1" />
        <max value="1" />
      </base>
      <type>
        <code value="uri" />
      </type>
      <fixedUri value="http://hl7.org/fhir/StructureDefinition/hspc-delta-flag" />
      <mapping>
        <identity value="rim" />
        <map value="N/A" />
      </mapping>
    </element>
    <element>
      <path value="Extension.valueCode" />
      <short value="Value of extension" />
      <definition value="Value of extension - may be a resource or one of a constrained set of the data types (see Extensibility in the spec for list)." />
      <min value="1" />
      <max value="1" />
      <base>
        <path value="Extension.value[x]" />
        <min value="0" />
        <max value="1" />
      </base>
      <type>
        <code value="code" />
      </type>
      <binding>
        <strength value="required" />
        <description value="Indicates that the data value in the containing model is a change from a previous instance of the same model" />
        <valueSetReference>
          <reference value="http://hl7.org/fhir/ValueSet/hspc-DeltaFlag" />
        </valueSetReference>
      </binding>
      <mapping>
        <identity value="rim" />
        <map value="N/A" />
      </mapping>
    </element>
  </snapshot>
  <differential>
    <element>
      <path value="Extension" />
      <short value="Indicate the data value in the containing model is a change from a previous instance of the same model" />
      <definition value="Takes a value from the valueset listed in the model to indicate the data value in the containing model is a change from a previous instance of the same model." />
      <comments value="This model is intended to constrain values from OBX-8 in a lab result HL7 message. Because OBX-8 is overloaded to contain multiple types of data, we need a way to tell which kind of code is sent (abnormal flag, delta flag, or ordinal interpretation." />
      <min value="0" />
      <max value="1" />
      <type>
        <code value="Extension" />
      </type>
      <isModifier value="false" />
    </element>
    <element>
      <path value="Extension.extension" />
      <name value="extension" />
      <max value="0" />
    </element>
    <element>
      <path value="Extension.url" />
      <type>
        <code value="uri" />
      </type>
      <fixedUri value="http://hl7.org/fhir/StructureDefinition/hspc-delta-flag" />
    </element>
    <element>
      <path value="Extension.value[x]" />
      <min value="1" />
      <type>
        <code value="code" />
      </type>
      <binding>
        <strength value="required" />
        <description value="Indicates that the data value in the containing model is a change from a previous instance of the same model" />
        <valueSetReference>
          <reference value="http://hl7.org/fhir/ValueSet/hspc-DeltaFlag" />
        </valueSetReference>
      </binding>
    </element>
  </differential>
</StructureDefinition>