FHIR Chat · Where are parameters like _history defined? · IG creation

Stream: IG creation

Topic: Where are parameters like _history defined?

Kevin Mayfield (Feb 15 2022 at 15:36):

I'm writing a proof of concept to verify OAS spec's are following FHIR conventions.

I'm using FHIR SearchParameter lookups to verify parameters but I'm not finding a few like

_format
_pretty

Where are they defined?

Thanks

Elliot Silver (Feb 15 2022 at 17:27):

https://www.hl7.org/fhir/http.html#parameters

Kevin Mayfield (Feb 16 2022 at 04:39):

Thanks, so it is not an actual resource?

Like _lastUpdated has a definition of http://hl7.org/fhir/SearchParameter/Resource-lastUpdated

Kevin Mayfield (Feb 16 2022 at 04:42):

Potentially we may look at also creating validation for CapabilityStatement and would wish to apply similar logic there also.

Would it be wrong to use SearchParameters for General Parameters like these?

Screenshot-2022-02-16-at-04.42.44.png

Grahame Grieve (Feb 16 2022 at 04:54):

no they should all have a SearchParameter resource defining them

Gino Canessa (Feb 16 2022 at 22:41):

Already documented in FHIR-26430 (older ticket, waiting to be applied)

Last updated: Apr 12 2022 at 19:14 UTC