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

<CodeSystem xmlns="http://hl7.org/fhir">
  <id value="group-characteristic-combination"/>
  <meta>
    <lastUpdated value="2026-04-01T17:59:15.240+00:00"/>
  </meta>
  <text>
    <status value="generated"/>
    <div xmlns="http://www.w3.org/1999/xhtml">
      <p class="res-header-id">
        <b>Generated Narrative: CodeSystem group-characteristic-combination</b>
      </p>
      <a name="group-characteristic-combination"> </a>
      <a name="hcgroup-characteristic-combination"> </a>
      <p>This case-sensitive code system 
        <code>http://hl7.org/fhir/group-characteristic-combination</code> defines the following codes:
      </p>
      <table class="codes">
        <tr>
          <td style="white-space:nowrap">
            <b>Code</b>
          </td>
          <td>
            <b>Display</b>
          </td>
          <td>
            <b>Definition</b>
          </td>
        </tr>
        <tr>
          <td style="white-space:nowrap">all-of
            <a name="group-characteristic-combination-all-of"> </a>
          </td>
          <td>All of</td>
          <td>Combine characteristics with AND.</td>
        </tr>
        <tr>
          <td style="white-space:nowrap">any-of
            <a name="group-characteristic-combination-any-of"> </a>
          </td>
          <td>Any of</td>
          <td>Combine characteristics with OR.</td>
        </tr>
        <tr>
          <td style="white-space:nowrap">at-least
            <a name="group-characteristic-combination-at-least"> </a>
          </td>
          <td>At least</td>
          <td>Meet at least the threshold number of characteristics for definition.</td>
        </tr>
        <tr>
          <td style="white-space:nowrap">at-most
            <a name="group-characteristic-combination-at-most"> </a>
          </td>
          <td>At most</td>
          <td>Meet at most the threshold number of characteristics for definition.</td>
        </tr>
        <tr>
          <td style="white-space:nowrap">except-subset
            <a name="group-characteristic-combination-except-subset"> </a>
          </td>
          <td>Except subset</td>
          <td>Meet the inclusion criteria under the condition that the basis does not match the exclusion criteria.</td>
        </tr>
        <tr>
          <td style="white-space:nowrap">statistical
            <a name="group-characteristic-combination-statistical"> </a>
          </td>
          <td>Statistical</td>
          <td>Combine characteristics statistically. Use method to specify the statistical method.</td>
        </tr>
        <tr>
          <td style="white-space:nowrap">net-effect
            <a name="group-characteristic-combination-net-effect"> </a>
          </td>
          <td>Net effect</td>
          <td>Combine characteristics by addition of benefits and subtraction of harms.</td>
        </tr>
        <tr>
          <td style="white-space:nowrap">dataset
            <a name="group-characteristic-combination-dataset"> </a>
          </td>
          <td>Dataset</td>
          <td>Combine characteristics as a collection used as the dataset.</td>
        </tr>
      </table>
    </div>
  </text>
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-wg">
    <valueCode value="fhir"/>
  </extension>
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status">
    <valueCode value="normative"/>
  </extension>
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm">
    <valueInteger value="3"/>
  </extension>
  <url value="http://hl7.org/fhir/group-characteristic-combination"/>
  <identifier>
    <system value="urn:ietf:rfc:3986"/>
    <value value="urn:oid:2.16.840.1.113883.4.642.4.1952"/>
  </identifier>
  <version value="6.0.0-ballot4"/>
  <name value="GroupCharacteristicCombination"/>
  <title value="Group Characteristic Combination"/>
  <status value="active"/>
  <experimental value="false"/>
  <date value="2021-01-05T10:01:24+11:00"/>
  <publisher value="HL7 (FHIR Project)"/>
  <contact>
    <telecom>
      <system value="url"/>
      <value value="http://hl7.org/fhir"/>
    </telecom>
    <telecom>
      <system value="email"/>
      <value value="fhir@lists.hl7.org"/>
    </telecom>
  </contact>
  <description value="Logical grouping of characteristics."/>
  <jurisdiction>
    <coding>
      <system value="http://unstats.un.org/unsd/methods/m49/m49.htm"/>
      <code value="001"/>
      <display value="World"/>
    </coding>
  </jurisdiction>
  <caseSensitive value="true"/>
  <content value="complete"/>
  <concept>
    <code value="all-of"/>
    <display value="All of"/>
    <definition value="Combine characteristics with AND."/>
  </concept>
  <concept>
    <code value="any-of"/>
    <display value="Any of"/>
    <definition value="Combine characteristics with OR."/>
  </concept>
  <concept>
    <code value="at-least"/>
    <display value="At least"/>
    <definition value="Meet at least the threshold number of characteristics for definition."/>
  </concept>
  <concept>
    <code value="at-most"/>
    <display value="At most"/>
    <definition value="Meet at most the threshold number of characteristics for definition."/>
  </concept>
  <concept>
    <code value="except-subset"/>
    <display value="Except subset"/>
    <definition value="Meet the inclusion criteria under the condition that the basis does not match the exclusion criteria."/>
  </concept>
  <concept>
    <code value="statistical"/>
    <display value="Statistical"/>
    <definition value="Combine characteristics statistically. Use method to specify the statistical method."/>
  </concept>
  <concept>
    <code value="net-effect"/>
    <display value="Net effect"/>
    <definition value="Combine characteristics by addition of benefits and subtraction of harms."/>
  </concept>
  <concept>
    <code value="dataset"/>
    <display value="Dataset"/>
    <definition value="Combine characteristics as a collection used as the dataset."/>
  </concept>
</CodeSystem>