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type: "doc"
source: "source/op-example-request.html"
---
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## Operation Request Example

| Responsible Owner: [\[%wgt fhir%\]]([%wg fhir%]) Work Group | [Standards Status](versions#std-process):[Informative](versions#std-process) |
| --- | --- |

POST \[base\]/ValueSet/$expand HTTP/1.1
Content-Type: application/fhir+xml

<!-- 
   This is an example of an operation request for a value set 
   expansion where the value set is submitted on the fly 
-->
<Parameters xmlns="http://hl7.org/fhir">
  <parameter>
    <name value="filter"/>
    <valueString name="abdo"/>
  </parameter>
  <parameter>
    <name value="valueset"/>  
    <resource>
      <ValueSet>
        <text>
          <status value="generated"/>
          <div xmlns="http://www.w3.org/1999/xhtml"><!-- Snipped for brevity --></div>
        </text>
        <identifier value="http://hl7.org/fhir/ValueSet/body-site"/>
        <name value="SNOMED CT Body Structures"/>
        <publisher value="FHIR Project team"/>
        <telecom>
          <system value="url"/>
          <value value="http://hl7.org/fhir"/>
        </telecom>
        <description value="This value set includes all the &quot;Clinical finding&quot; SNOMED CT codes (i.e., codes
         with an is-a relationship with 91723000: Anatomical structure)"/>
        <status value="draft"/>
        <compose>
          <include><!--   all the descendants of clinical finding, not include itself   -->
            <system value="http://snomed.info/sct"/>
            <filter><!--   todo: work this over. what this means is any concepts where they have is-a with 91723000.
               how should this be done?   -->
              <property value="concept"/>
              <op value="is-a"/>
              <value value="91723000"/>
            </filter>
          </include>
        </compose>
      </ValueSet>
    </resource>
  </parameter>
</Parameters>

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