<?xml version="1.0" encoding="UTF-8"?>
<CodeSystem xmlns="http://hl7.org/fhir">
  <id value="data-absent-reason"/>
  <meta>
    <lastUpdated value="2019-11-01T09:29:23.356+11:00"/>
  </meta>
  <language value="en"/>
  <text>
    <status value="generated"/>
    <div value="&lt;div xmlns=&quot;http://www.w3.org/1999/xhtml&quot; xml:lang=&quot;en&quot; lang=&quot;en&quot;&gt;&lt;p class=&quot;res-header-id&quot;&gt;&lt;b&gt;Generated Narrative: CodeSystem data-absent-reason&lt;/b&gt;&lt;/p&gt;&lt;a name=&quot;data-absent-reason&quot;&gt; &lt;/a&gt;&lt;a name=&quot;hcdata-absent-reason&quot;&gt; &lt;/a&gt;&lt;div style=&quot;display: inline-block; background-color: #d9e0e7; padding: 6px; margin: 4px; border: 1px solid #8da1b4; border-radius: 5px; line-height: 60%&quot;&gt;&lt;p style=&quot;margin-bottom: 0px&quot;&gt;Last updated: 2019-11-01 09:29:23+1100; Language: en&lt;/p&gt;&lt;/div&gt;&lt;p&gt;This case-sensitive code system &lt;code&gt;http://terminology.hl7.org/CodeSystem/data-absent-reason&lt;/code&gt; defines the following codes in an undefined hierarchy:&lt;/p&gt;&lt;table class=&quot;codes&quot;&gt;&lt;tr&gt;&lt;td&gt;&lt;b&gt;Lvl&lt;/b&gt;&lt;/td&gt;&lt;td style=&quot;white-space:nowrap&quot;&gt;&lt;b&gt;Code&lt;/b&gt;&lt;/td&gt;&lt;td&gt;&lt;b&gt;Display&lt;/b&gt;&lt;/td&gt;&lt;td&gt;&lt;b&gt;Definition&lt;/b&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td&gt;1&lt;/td&gt;&lt;td style=&quot;white-space:nowrap&quot;&gt;unknown&lt;a name=&quot;data-absent-reason-unknown&quot;&gt; &lt;/a&gt;&lt;/td&gt;&lt;td&gt;Unknown&lt;/td&gt;&lt;td&gt;The value is expected to exist but is not known.&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td&gt;2&lt;/td&gt;&lt;td style=&quot;white-space:nowrap&quot;&gt;  asked-unknown&lt;a name=&quot;data-absent-reason-asked-unknown&quot;&gt; &lt;/a&gt;&lt;/td&gt;&lt;td&gt;Asked But Unknown&lt;/td&gt;&lt;td&gt;The source was asked but does not know the value.&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td&gt;2&lt;/td&gt;&lt;td style=&quot;white-space:nowrap&quot;&gt;  temp-unknown&lt;a name=&quot;data-absent-reason-temp-unknown&quot;&gt; &lt;/a&gt;&lt;/td&gt;&lt;td&gt;Temporarily Unknown&lt;/td&gt;&lt;td&gt;There is reason to expect (from the workflow) that the value may become known.&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td&gt;2&lt;/td&gt;&lt;td style=&quot;white-space:nowrap&quot;&gt;  not-asked&lt;a name=&quot;data-absent-reason-not-asked&quot;&gt; &lt;/a&gt;&lt;/td&gt;&lt;td&gt;Not Asked&lt;/td&gt;&lt;td&gt;The workflow didn&apos;t lead to this value being known.&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td&gt;2&lt;/td&gt;&lt;td style=&quot;white-space:nowrap&quot;&gt;  asked-declined&lt;a name=&quot;data-absent-reason-asked-declined&quot;&gt; &lt;/a&gt;&lt;/td&gt;&lt;td&gt;Asked But Declined&lt;/td&gt;&lt;td&gt;The source was asked but declined to answer.&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td&gt;1&lt;/td&gt;&lt;td style=&quot;white-space:nowrap&quot;&gt;masked&lt;a name=&quot;data-absent-reason-masked&quot;&gt; &lt;/a&gt;&lt;/td&gt;&lt;td&gt;Masked&lt;/td&gt;&lt;td&gt;The information is not available due to security, privacy or related reasons.&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td&gt;1&lt;/td&gt;&lt;td style=&quot;white-space:nowrap&quot;&gt;not-applicable&lt;a name=&quot;data-absent-reason-not-applicable&quot;&gt; &lt;/a&gt;&lt;/td&gt;&lt;td&gt;Not Applicable&lt;/td&gt;&lt;td&gt;There is no proper value for this element (e.g. last menstrual period for a male).&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td&gt;1&lt;/td&gt;&lt;td style=&quot;white-space:nowrap&quot;&gt;unsupported&lt;a name=&quot;data-absent-reason-unsupported&quot;&gt; &lt;/a&gt;&lt;/td&gt;&lt;td&gt;Unsupported&lt;/td&gt;&lt;td&gt;The source system wasn&apos;t capable of supporting this element.&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td&gt;1&lt;/td&gt;&lt;td style=&quot;white-space:nowrap&quot;&gt;as-text&lt;a name=&quot;data-absent-reason-as-text&quot;&gt; &lt;/a&gt;&lt;/td&gt;&lt;td&gt;As Text&lt;/td&gt;&lt;td&gt;The content of the data is represented in the resource narrative.&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td&gt;1&lt;/td&gt;&lt;td style=&quot;white-space:nowrap&quot;&gt;error&lt;a name=&quot;data-absent-reason-error&quot;&gt; &lt;/a&gt;&lt;/td&gt;&lt;td&gt;Error&lt;/td&gt;&lt;td&gt;Some system or workflow process error means that the information is not available.&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td&gt;2&lt;/td&gt;&lt;td style=&quot;white-space:nowrap&quot;&gt;  not-a-number&lt;a name=&quot;data-absent-reason-not-a-number&quot;&gt; &lt;/a&gt;&lt;/td&gt;&lt;td&gt;Not a Number (NaN)&lt;/td&gt;&lt;td&gt;The numeric value is undefined or unrepresentable due to a floating point processing error.&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td&gt;2&lt;/td&gt;&lt;td style=&quot;white-space:nowrap&quot;&gt;  negative-infinity&lt;a name=&quot;data-absent-reason-negative-infinity&quot;&gt; &lt;/a&gt;&lt;/td&gt;&lt;td&gt;Negative Infinity (NINF)&lt;/td&gt;&lt;td&gt;The numeric value is excessively low and unrepresentable due to a floating point processing        error.&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td&gt;2&lt;/td&gt;&lt;td style=&quot;white-space:nowrap&quot;&gt;  positive-infinity&lt;a name=&quot;data-absent-reason-positive-infinity&quot;&gt; &lt;/a&gt;&lt;/td&gt;&lt;td&gt;Positive Infinity (PINF)&lt;/td&gt;&lt;td&gt;The numeric value is excessively high and unrepresentable due to a floating point processing        error.&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td&gt;1&lt;/td&gt;&lt;td style=&quot;white-space:nowrap&quot;&gt;not-performed&lt;a name=&quot;data-absent-reason-not-performed&quot;&gt; &lt;/a&gt;&lt;/td&gt;&lt;td&gt;Not Performed&lt;/td&gt;&lt;td&gt;The value is not available because the observation procedure (test, etc.) was not performed.&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td&gt;1&lt;/td&gt;&lt;td style=&quot;white-space:nowrap&quot;&gt;not-permitted&lt;a name=&quot;data-absent-reason-not-permitted&quot;&gt; &lt;/a&gt;&lt;/td&gt;&lt;td&gt;Not Permitted&lt;/td&gt;&lt;td&gt;The value is not permitted in this context (e.g. due to profiles, or the base data types).&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;"/>
  </text>
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-wg">
    <valueCode value="oo"/>
  </extension>
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-normative-version">
    <valueCode value="4.0.0"/>
  </extension>
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm">
    <valueInteger value="5"/>
  </extension>
  <url value="http://terminology.hl7.org/CodeSystem/data-absent-reason"/>
  <identifier>
    <system value="urn:ietf:rfc:3986"/>
    <value value="urn:oid:2.16.840.1.113883.4.642.4.1048"/>
  </identifier>
  <version value="1.0.0"/>
  <name value="DataAbsentReason"/>
  <title value="DataAbsentReason"/>
  <status value="active"/>
  <experimental value="false"/>
  <date value="2019-11-01T09:29:23+11:00"/>
  <publisher value="Health Level Seven International"/>
  <contact>
    <telecom>
      <system value="url"/>
      <value value="http://hl7.org"/>
    </telecom>
    <telecom>
      <system value="email"/>
      <value value="hq@HL7.org"/>
    </telecom>
  </contact>
  <description value="Used to specify why the normally expected content of the data element is missing."/>
  <copyright value="This material derives from the HL7 Terminology (THO). THO is copyright ©1989+ Health Level Seven International and is made available under the CC0 designation. For more licensing information see: https://terminology.hl7.org/license.html"/>
  <caseSensitive value="true"/>
  <valueSet value="http://hl7.org/fhir/ValueSet/data-absent-reason"/>
  <content value="complete"/>
  <concept>
    <code value="unknown"/>
    <display value="Unknown"/>
    <definition value="The value is expected to exist but is not known."/>
    <concept>
      <code value="asked-unknown"/>
      <display value="Asked But Unknown"/>
      <definition value="The source was asked but does not know the value."/>
    </concept>
    <concept>
      <code value="temp-unknown"/>
      <display value="Temporarily Unknown"/>
      <definition value="There is reason to expect (from the workflow) that the value may become known."/>
    </concept>
    <concept>
      <code value="not-asked"/>
      <display value="Not Asked"/>
      <definition value="The workflow didn&apos;t lead to this value being known."/>
    </concept>
    <concept>
      <code value="asked-declined"/>
      <display value="Asked But Declined"/>
      <definition value="The source was asked but declined to answer."/>
    </concept>
  </concept>
  <concept>
    <extension url="http://hl7.org/fhir/StructureDefinition/codesystem-concept-comments">
      <valueString value="Using &quot;masked&quot; may be breach of security or confidentiality, but there are times        when its use is required to support alternate workflows for gaining access to denied information."/>
    </extension>
    <code value="masked"/>
    <display value="Masked"/>
    <definition value="The information is not available due to security, privacy or related reasons."/>
  </concept>
  <concept>
    <code value="not-applicable"/>
    <display value="Not Applicable"/>
    <definition value="There is no proper value for this element (e.g. last menstrual period for a male)."/>
  </concept>
  <concept>
    <code value="unsupported"/>
    <display value="Unsupported"/>
    <definition value="The source system wasn&apos;t capable of supporting this element."/>
  </concept>
  <concept>
    <extension url="http://hl7.org/fhir/StructureDefinition/codesystem-concept-comments">
      <valueString value="It may be linked by internal references (e.g. xml:id). This usually implies that the value        could not be represented in the correct format - this may be due to system limitations,        or this particular data value."/>
    </extension>
    <code value="as-text"/>
    <display value="As Text"/>
    <definition value="The content of the data is represented in the resource narrative."/>
  </concept>
  <concept>
    <code value="error"/>
    <display value="Error"/>
    <definition value="Some system or workflow process error means that the information is not available."/>
    <concept>
      <extension url="http://hl7.org/fhir/StructureDefinition/codesystem-concept-comments">
        <valueString value="This is sometimes an output value from measuring devices."/>
      </extension>
      <code value="not-a-number"/>
      <display value="Not a Number (NaN)"/>
      <definition value="The numeric value is undefined or unrepresentable due to a floating point processing error."/>
    </concept>
    <concept>
      <extension url="http://hl7.org/fhir/StructureDefinition/codesystem-concept-comments">
        <valueString value="This is sometimes an output value from measuring devices."/>
      </extension>
      <code value="negative-infinity"/>
      <display value="Negative Infinity (NINF)"/>
      <definition value="The numeric value is excessively low and unrepresentable due to a floating point processing        error."/>
    </concept>
    <concept>
      <extension url="http://hl7.org/fhir/StructureDefinition/codesystem-concept-comments">
        <valueString value="This is sometimes an output value from measuring devices."/>
      </extension>
      <code value="positive-infinity"/>
      <display value="Positive Infinity (PINF)"/>
      <definition value="The numeric value is excessively high and unrepresentable due to a floating point processing        error."/>
    </concept>
  </concept>
  <concept>
    <code value="not-performed"/>
    <display value="Not Performed"/>
    <definition value="The value is not available because the observation procedure (test, etc.) was not performed."/>
  </concept>
  <concept>
    <extension url="http://hl7.org/fhir/StructureDefinition/codesystem-concept-comments">
      <valueString value="This is most often associated with required bindings that do not include the actual code        used, but may be used with other data types."/>
    </extension>
    <code value="not-permitted"/>
    <display value="Not Permitted"/>
    <definition value="The value is not permitted in this context (e.g. due to profiles, or the base data types)."/>
  </concept>
</CodeSystem>