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