Operation Definition

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

<OperationDefinition xmlns="http://hl7.org/fhir">
  <id value="Resource-meta"/> 
  <text> 
    <status value="extensions"/> 
    <div xmlns="http://www.w3.org/1999/xhtml">
      <p> URL: [base]/$meta</p> 
      <p> URL: [base]/Resource/$meta</p> 
      <p> URL: [base]/Resource/[id]/$meta</p> 
      <p> Parameters</p> 
      <table class="grid">
        <tr> 
          <td> 
            <b> Use</b> 
          </td> 
          <td> 
            <b> Name</b> 
          </td> 
          <td> 
            <b> Cardinality</b> 
          </td> 
          <td> 
            <b> Type</b> 
          </td> 
          <td> 
            <b> Binding</b> 
          </td> 
          <td> 
            <b> Documentation</b> 
          </td> 
        </tr> 
        <tr> 
          <td> OUT</td> 
          <td> return</td> 
          <td> 1..1</td> 
          <td> 
            <a href="resource.html#Meta">Meta</a> 
          </td> 
          <td/>  
          <td> 
            <div> 
              <p> The meta returned by the operation</p> 

            </div> 
          </td> 
        </tr> 
      </table> 
      <div> 
        <p> At the system and type levels, the $meta operation is used to get a summary of
           all the labels that are in use across the system. The principal use for this operation
           is to support search e.g. what tags can be searched for. At these levels, the meta
           will not contain versionId, lastUpdated etc. Systems are not obligated to implement
           the operation at this level (and should return a 4xx error if they don't). At the
           resource and historical entry level, the $meta operation returns the same meta
           as would be returned by accessing the resource directly. This can be used to allow
           a system to get access to the meta-information for the resource without accessing
           the resource itself, e.g. for security reasons</p> 

      </div> 
    </div> 
  </text> 
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm">
    <valueInteger value="3"/> 
  </extension> 
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status">
    <valueCode value="trial-use"/> 
  </extension> 
  <url value="http://hl7.org/fhir/OperationDefinition/Resource-meta"/> 
  <version value="5.0.0-ballot"/> 
  <name value="Meta"/> 
  <title value="Access a list of profiles, tags, and security labels"/> 
  <status value="draft"/> 
  <kind value="operation"/> 
  <experimental value="false"/> 
  <date value="2022-09-10T04:52:37+10:00"/> 
  <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="This operation retrieves a summary of the profiles, tags, and security labels for
   the given scope; e.g. for each scope:  

* system-wide: a list of all profiles, tags and security labels in use by the system
   
* resource-type level: A list of all profiles, tags, and security labels for the
   resource type 
* individual resource level: A list of all profiles, tags, and security labels
   for the current version of the resource.  Also, as a special case, this operation
   (and other meta operations) can be performed on a historical version of a resource)"/> 
  <affectsState value="false"/> 
  <code value="meta"/> 
  <comment value="At the system and type levels, the $meta operation is used to get a summary of
   all the labels that are in use across the system. The principal use for this operation
   is to support search e.g. what tags can be searched for. At these levels, the meta
   will not contain versionId, lastUpdated etc. Systems are not obligated to implement
   the operation at this level (and should return a 4xx error if they don't). At the
   resource and historical entry level, the $meta operation returns the same meta
   as would be returned by accessing the resource directly. This can be used to allow
   a system to get access to the meta-information for the resource without accessing
   the resource itself, e.g. for security reasons"/> 
  <resource value="Resource"/> 
  <system value="true"/> 
  <type value="true"/> 
  <instance value="true"/> 
  <parameter> 
    <name value="return"/> 
    <use value="out"/> 
    <min value="1"/> 
    <max value="1"/> 
    <documentation value="The meta returned by the operation"/> 
    <type value="Meta"/> 
  </parameter> 
</OperationDefinition>