Existing Wording: _profile=http://hl7.org/fhir/StructureDefinition/observation-geneticsGene

Comment:

Although this will work with some servers, the _profile query parameter is not a strong query parameter to use for selecting genomics information. It will also not work at all on servers that explicitly don't support the query parameter. It will give false-negatives on a server which was not given profile conformance values, or does not do automatic tagging.

This query parameter is also not very likely to reduce the returned results in any signficant way.

I recommend against use of it due to these factors.

Summary:

Caution on _profile query