This section discusses CQL requirements, but there is other potentially useful guidance to be provided here. Specifically, consider referencing the following:

1. Using Expressions topic in the base FHIR specification: http://hl7.org/fhir/clinicalreasoning-topics-using-expressions.html

2. CQL Conventions in the CQL specification: https://cql.hl7.org/14-g-formattingconventions.html

3. Using Libraries guidance in the CPG-on-FHIR IG: http://hl7.org/fhir/uv/cpg/2019SEP/documentation-libraries.html

Specifically, we recommend conformance requirements around the use of CQL libraries consistent with the Clinical Practice Guidlines on FHIR (CPG-on-FHIR) IG. If there are gaps that prevent referencing these requirements, we would welcome that feedback to the CPG-on-FHIR IG as we try to establish consistent usage and distribution requirements for CQL libraries.