Stream: cql
Topic: FHIRHelpers documentation?
Paul Lynch (Feb 25 2020 at 18:11):
I was trying to find documentation for the FHIRHelpers library to see what was in it, and the best I could find was http://hl7.org/fhir/library-fhir-helpers.html, which does not tell me much. Is there something like API documentation for this library somewhere?
Chris Moesel (Feb 25 2020 at 18:16):
Hi @Paul Lynch -- I don't know about documentation, but here is the CQL source for all of the FHIRHelpers versions: https://github.com/cqframework/clinical_quality_language/tree/master/Src/java/quick/src/main/resources/org/hl7/fhir
Bryn Rhodes (Feb 25 2020 at 18:20):
Unfortunately, there's not a lot of documentation, but in addition to the CQL source that Chris linked, there are entries in the FHIR modelinfo that link the functions defined in the FHIRHelpers library to _implicit conversions_ in CQL, which the translator then uses to add conversion functions implicitly when it detects that it can.
Bryn Rhodes (Feb 25 2020 at 18:21):
The end result is that CQL authors don't have to say Observation.status.value = 'final', they can just say Observation.status = 'final' and the translator will insert FHIRHelpers.ToString to support the comparison.
Last updated: Apr 12 2022 at 19:14 UTC
