Unexpected Value Set $expand results from LOINC answer list implicit value set syntax

[rrha...@gmail.com]

I just tried this LOINC answer list implicit value set query on my HAPI 6.4.4 JPA server instance:

https://fhir.hausamconsulting.com/r4/ValueSet/$expand?url=http://loinc.org/vs/LL4938-8

And I got these results from the $expand:

{ "resourceType": "ValueSet", "id": "LL4938-8", "meta": { "extension": [ { "url": "http://hapifhir.io/fhir/StructureDefinition/valueset-expansion-message", "valueString": "ValueSet was expanded using an expansion that was pre-calculated at (unknown)" } ], "versionId": "2" }, "url": "http://loinc.org/vs/LL4938-8", "status": "active", "compose": { "include": [ { "system": "http://loinc.org", "concept": [ { "code": "LA65-8", "display": "Improved" }, { "code": "LA6635-2", "display": "Stabilized" }, { "code": "LA66-6", "display": "Deteriorated" }, { "code": "LA9041-0", "display": "Resolved" }, { "code": "LA65-8", "display": "Improved" }, { "code": "LA6635-2", "display": "Stabilized" }, { "code": "LA66-6", "display": "Deteriorated" }, { "code": "LA9041-0", "display": "Resolved" } ] } ] }, "expansion": { "identifier": "91faf34a-28a2-489c-96ce-554fe7a73aa3", "timestamp": "2023-07-24T03:49:37+00:00", "total": 0, "offset": 0, "parameter": [ { "name": "offset", "valueInteger": 0 }, { "name": "count", "valueInteger": 1000 } ] } }

The obvious things that I'm noticing here are:

1. In the 'compose' element (which the server apparently generates), each of the concept instances and codes are being listed twice.  That seems odd, and certainly isn't a useful situation or the normal expectation.
2. The valueset expansion message states that "ValueSet was expanded using an expansion that was pre-calculated at (unknown)".  It's not obvious when or how that pre-calculation is being done.
3. But even though the  'compose' is present and the expansion is "pre-calculated", no actual expansion results are being returned.  The 4 unique concepts in the 'compose' should have been returned in the expansion (whether it was pre-calculated or not).

The public HAPI server doesn't appear to have LOINC loaded, so I couldn't test this there.  It's not clear to me if this represents common (undesirable) behavior and warrants submitting an issue - or if it may at least in part be specific to my particular server instance, and therefore needs something to be done locally (e.g. fix indexing or something else?).

Rob

[Robert Hausam]

Apologies for the formatting.  Hopefully this is better:

{

--
You received this message because you are subscribed to the Google Groups "HAPI FHIR" group.
To unsubscribe from this group and stop receiving emails from it, send an email to hapi-fhir+...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/hapi-fhir/015036f0-ba98-4e1c-8a52-54af8fb80e16n%40googlegroups.com.

--

Robert Hausam, MD

+1 (801) 949-1556

rrha...@gmail.com