Support Canonical URLs in Search Params

[alexanderkiel]

Note that for uri parameters that refer to the Canonical URLs of the conformance and knowledge resources (e.g. StructureDefinition, ValueSet, PlanDefinition etc), servers SHOULD support searching by canonical references, and SHOULD support automatically detecting a |[version] portion as part of the search parameter, and interpreting that portion as a search on the version.

http://hl7.org/fhir/R4/search.html#uri