Comment:

The extension valueset-trusted-expansion has a datatype = uri and indicates an authoritative source for performing value set expansions.

This extension should only be used if the "authoritative source" (valueset-authoritativeSource extension) does not have a FHIR service which is capable of generating a valid FHIR expansion. Suggest adding the following text

TO valueset-authoritativeSource:

The designated "authoritative source" is normally expected to be able to generate a valid expansion of the value set, and if for some reason it cannot then the valueset-trusted-expansion should be used.

TO valueset-trusted-expansion:

If the designated "authoritative source" (as specified in the valueset-authoritativeSource extension, if present) is unable to provide a valid expansion, this extension indicates an alternate authoritative source where the value set expansion may be obtained.

Please note, all of the items in this ballot require resolution at the vocab work group call

Summary:

Add text to valueset-authoritativeSource and trusted-expansion