HL7 Cross-Paradigm Specification: Clinical Quality Language, Release 1

Although there are several standards for expressing clinical quality logic, the standards are not widely adopted and present various barriers to point-to-point sharing of clinical knowledge artefacts. This specification enables shared understanding of clinical knowledge by defining a syntax-independent, canonical representation of logic that can be used to express the knowledge in any given artefact, and enables point-to-point sharing by defining a serialisation for that representation. It introduces a high-level, domain-specific language – Clinical Quality Language – focused on clinical quality and targeted at authors of measure and decision support artefacts.

Main sections:

· Author’s guide

· Developer’s guide

· Logical specification

· Language semantics

· Translation semantics

· Physical representation

· Appendix A: CQL syntax formal specification

· Appendix B: CQL reference

· Appendix C: Reference implementations

· Appendix D: References

· Appendix E: Acronyms

· Appendix F: Glossary

· Appendix G: Conventions

· Appendix H: Timing interval calculation examples

· Appendix I: FHIRPath function translation

· Appendix J: List of tables

· Appendix K: List of figures

· Appendix L: CQL syntax diagrams