The endpoints /ValueSet and /ValueSet/{valueSetId} and corresponding operations expose the following types of terminology resources:
SNOMED CT Simple Type Reference Sets with Concepts as referenced components.
SNOMED CT Query Type Reference Sets with ECL expressions (each member is a Value Set)
Snow Owl's generic Value Sets
Delete and create operations are not implemented.
All value sets accessible via the /ValueSet endpoints can be expanded.
For SNOMED CT URIs, implicit value sets are supported:
?fhir_vs - all Concept IDs in the edition/version. If the base URI is http://snomed.info/sct, this means all possible SNOMED CT concepts
?fhir_vs=isa/[sctid] - all concept IDs that are subsumed by the specified Concept.
?fhir_vs=refset - all concept ids that correspond to real references sets defined in the specified SNOMED CT edition
?fhir_vs=refset/[sctid] - all concept IDs in the specified reference set
The in-parameters are not yet supported.
Codes can be validated against a given Value Set specified by the value set's logical id or canonical URL. In terms of Snow Owl terminology components, codes are validated against:
SNOMED CT Simple Type Reference Sets with Concepts as referenced components.
SNOMED CT Query Type Reference Sets with ECL expressions (each member is a Value Set)
Snow Owl's generic Value Sets
Validation performs the following checks:
The existence of the given Value Set (error if not found)
The existence of the reference in the existing Value Set to the given code (error if not found)
The existence of the given code in the system (error if not found)
Potential version mismatch (_error if the reference points to a version that is different to the code's version)
The status of the given code and reference (warning if code is inactive while reference is active)
For SNOMED CT URIs, implicit value sets are supported:
?fhir_vs - all Concept IDs in the edition/version. If the base URI is http://snomed.info/sct, this means all possible SNOMED CT concepts
?fhir_vs=isa/[sctid] - all concept IDs that are subsumed by the specified Concept.
?fhir_vs=refset - all concept ids that correspond to real references sets defined in the specified SNOMED CT edition
?fhir_vs=refset/[sctid] - all concept IDs in the specified reference set