FHIR FHIRPath Function: %terminologies.expand

This page is part of FHIR FHIRPath (FHIR-specific extensions). Base spec lives at FHIRPath.

%terminologies.expand(valueSet, params) : ValueSet

This calls the Terminology Service $expand operation (formal definition).

Parameters:

• valueSet: either an actual ValueSet, or a canonical URL reference to a value set.
• params: a URL encoded string with other parameters for the expand operation (e.g., 'displayLanguage=en&activeOnly=true')

Return Value: a ValueSet with an expansion. If an error occurs, the return value is empty.

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