Definition for Code SystemDataAbsentReason

<?xml version="1.0" encoding="UTF-8"?>

<CodeSystem xmlns="http://hl7.org/fhir">
  <id value="data-absent-reason"/> 
  <meta> 
    <lastUpdated value="2022-09-07T10:58:29.429+10:00"/> 
  </meta> 
  <text> 
    <status value="extensions"/> 
    <div xmlns="http://www.w3.org/1999/xhtml">
      <p> This code system 
        <code> http://terminology.hl7.org/CodeSystem/data-absent-reason</code>  defines the following codes:
      </p> 
      <table class="codes">
        <tr> 
          <td> 
            <b> Lvl</b> 
          </td> 
          <td style="white-space:nowrap">
            <b> Code</b> 
          </td> 
          <td> 
            <b> Display</b> 
          </td> 
          <td> 
            <b> Definition</b> 
          </td> 
          <td> 
            <b> Comments</b> 
          </td> 
        </tr> 
        <tr> 
          <td> 1</td> 
          <td style="white-space:nowrap">unknown
            <a name="data-absent-reason-unknown"> </a> 
          </td> 
          <td> Unknown</td> 
          <td> The value is expected to exist but is not known.</td> 
          <td/>  
        </tr> 
        <tr> 
          <td> 2</td> 
          <td style="white-space:nowrap">  asked-unknown
            <a name="data-absent-reason-asked-unknown"> </a> 
          </td> 
          <td> Asked But Unknown</td> 
          <td> The source was asked but does not know the value.</td> 
          <td/>  
        </tr> 
        <tr> 
          <td> 2</td> 
          <td style="white-space:nowrap">  temp-unknown
            <a name="data-absent-reason-temp-unknown"> </a> 
          </td> 
          <td> Temporarily Unknown</td> 
          <td> There is reason to expect (from the workflow) that the value may become known.</td> 
          <td/>  
        </tr> 
        <tr> 
          <td> 2</td> 
          <td style="white-space:nowrap">  not-asked
            <a name="data-absent-reason-not-asked"> </a> 
          </td> 
          <td> Not Asked</td> 
          <td> The workflow didn't lead to this value being known.</td> 
          <td/>  
        </tr> 
        <tr> 
          <td> 2</td> 
          <td style="white-space:nowrap">  asked-declined
            <a name="data-absent-reason-asked-declined"> </a> 
          </td> 
          <td> Asked But Declined</td> 
          <td> The source was asked but declined to answer.</td> 
          <td/>  
        </tr> 
        <tr> 
          <td> 1</td> 
          <td style="white-space:nowrap">masked
            <a name="data-absent-reason-masked"> </a> 
          </td> 
          <td> Masked</td> 
          <td> The information is not available due to security, privacy or related reasons.</td> 
          <td> 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.</td> 
        </tr> 
        <tr> 
          <td> 1</td> 
          <td style="white-space:nowrap">not-applicable
            <a name="data-absent-reason-not-applicable"> </a> 
          </td> 
          <td> Not Applicable</td> 
          <td> There is no proper value for this element (e.g. last menstrual period for a male).</td> 
          <td/>  
        </tr> 
        <tr> 
          <td> 1</td> 
          <td style="white-space:nowrap">unsupported
            <a name="data-absent-reason-unsupported"> </a> 
          </td> 
          <td> Unsupported</td> 
          <td> The source system wasn't capable of supporting this element.</td> 
          <td/>  
        </tr> 
        <tr> 
          <td> 1</td> 
          <td style="white-space:nowrap">as-text
            <a name="data-absent-reason-as-text"> </a> 
          </td> 
          <td> As Text</td> 
          <td> The content of the data is represented in the resource narrative.</td> 
          <td> 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.</td> 
        </tr> 
        <tr> 
          <td> 1</td> 
          <td style="white-space:nowrap">error
            <a name="data-absent-reason-error"> </a> 
          </td> 
          <td> Error</td> 
          <td> Some system or workflow process error means that the information is not available.</td> 
          <td/>  
        </tr> 
        <tr> 
          <td> 2</td> 
          <td style="white-space:nowrap">  not-a-number
            <a name="data-absent-reason-not-a-number"> </a> 
          </td> 
          <td> Not a Number (NaN)</td> 
          <td> The numeric value is undefined or unrepresentable due to a floating point processing error.</td> 
          <td> This is sometimes an output value from measuring devices.</td> 
        </tr> 
        <tr> 
          <td> 2</td> 
          <td style="white-space:nowrap">  negative-infinity
            <a name="data-absent-reason-negative-infinity"> </a> 
          </td> 
          <td> Negative Infinity (NINF)</td> 
          <td> The numeric value is excessively low and unrepresentable due to a floating point processing
             error.</td> 
          <td> This is sometimes an output value from measuring devices.</td> 
        </tr> 
        <tr> 
          <td> 2</td> 
          <td style="white-space:nowrap">  positive-infinity
            <a name="data-absent-reason-positive-infinity"> </a> 
          </td> 
          <td> Positive Infinity (PINF)</td> 
          <td> The numeric value is excessively high and unrepresentable due to a floating point processing
             error.</td> 
          <td> This is sometimes an output value from measuring devices.</td> 
        </tr> 
        <tr> 
          <td> 1</td> 
          <td style="white-space:nowrap">not-performed
            <a name="data-absent-reason-not-performed"> </a> 
          </td> 
          <td> Not Performed</td> 
          <td> The value is not available because the observation procedure (test, etc.) was not performed.</td> 
          <td/>  
        </tr> 
        <tr> 
          <td> 1</td> 
          <td style="white-space:nowrap">not-permitted
            <a name="data-absent-reason-not-permitted"> </a> 
          </td> 
          <td> Not Permitted</td> 
          <td> The value is not permitted in this context (e.g. due to profiles, or the base data types).</td> 
          <td> This is most often associated with required bindings that do not include the actual code
             used, but may be used with other data types.</td> 
        </tr> 
      </table> 
    </div> 
  </text> 
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-wg">
    <valueCode value="oo"/> 
  </extension> 
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status">
    <valueCode value="normative"/> 
  </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="5.0.0-ballot"/> 
  <name value="DataAbsentReason"/> 
  <title value="DataAbsentReason"/> 
  <status value="active"/> 
  <experimental value="false"/> 
  <date value="2022-09-07T10:58:29+10:00"/> 
  <description value="Used to specify why the normally expected content of the data element is missing."/> 
  <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'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'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>