Processing of a $translate operation invoked at instance level (i.e. [base]/ConceptMap/[id]/$translate) request allows terminology server implementations to use additional knowledge available to the server to return matches in the response. They may be cases where clients wish to only have matches returned based on relationships in the ConceptMap itself (and no additional information known to the terminology server).

Proposal:

It is proposed that an optional boolean input parameter be added to $translate to control whether

• only the ConceptMap is used (true case); or
• not (false state).

The parameter may be named "onlyUseConceptMap" (or a more appropriate name) and must default to false if not provided.