CTS2-LE REST API: Requesting Concept Details

Because of CTS2-LE_REST_API:_Resolve_Value_Set is a multi modal operation, the operation can be used to retrieve single codes in detail. This functionality requires that parameter code is set.

For instance, the call

http://<host>/WebCts2LE/rest/fhir/ValueSet?_query=expand
	&identifier=http://hl7.org/fhir/vs/administrative-gender
	&codeSystemUri=http://hl7.org/fhir/v3/AdministrativeGender&code=M

retrieves only the male code

...
<expansion>
   <timestamp />
   <contains xmlns="http://hl7.org/fhir">
      <system value="urn:oid:2.16.840.1.113883.5.1" />
      <code value="M" />
      <display value="Male" />
   </contains>
</expansion>
...

The same call can be performed to check wether a (code, code system)-pair is contained in a value set. If this pair is not contained the call yields an atom response with an expansion element that does not has any contains-elements as children:

...
<expansion>
   <timestamp />
</expansion>
...