Author a CQL Library resource with embedded CQL logic and ELM content for use in a FHIR quality measure

Steps

1. Write Clinical Quality Language (CQL) logic in a text file, defining a library declaration, using statements for FHIR model and terminology, and named expressions for measure populations (e.g., Initial Population, Denominator, Numerator)
2. Compile the CQL to ELM JSON using the CQL-to-ELM translator (available as a Java tool or via cqf-ruler endpoint) to generate machine-executable logic
3. Create a FHIR Library resource with content[0].contentType=text/cql and content[0].data containing the base64-encoded CQL text, and content[1].contentType=application/elm+json with the base64-encoded ELM JSON
4. Set Library.type.coding to logic-library, populate Library.url with the canonical, and add relatedArtifact entries for any dependent Libraries or ValueSets
5. POST the Library resource to the FHIR server, then reference it from a Measure resource via Measure.library[] with the Library canonical URL
6. Invoke $evaluate-measure to confirm the embedded CQL logic executes correctly against test patient data