Comment:

The Value Set Definition standard slated to go normative has a element called Syntax-based Content Expressions.

The VSD specification is meant to provide guidelines for all HL7 products. However, each HL7 product has a specific supported syntax. FHIR only supports the FHIR syntax. Therefore, this VSD element does not exist in FHIR. FHIR is consistent with the VSD but not as expressive as the syntax options described in the VSD. Suggest explicitly noting this in FHIR and providing guidiance on use of extensions to provide the syntax reference and expression

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

Summary:

Explicitly note FHIR syntax limitations and provide extension