Clinical Quality Language (Jira PSS-2409)

Clinical Quality Language has been a published mixed normative/trial use specification since April 2020. In that time the language has been used to represent clinical logic in multiple domains in the healthcare industry including quality measurement, decision support, public health reporting, chronic disease surveillance, and clinical guidelines. In addition, multiple vendors have implemented CQL engines and related tooling.

This project will incorporate feedback from across stakeholders and implementation experience to address issues that have been encountered, as well as add new capabilities that have been requested.

Specifically, the project will focus on:

1) Enhancing the test suite included in the specification to close gaps in testing coverage, address inconsistencies between the tests and the specification, and support demonstration of engine conformance

2) Adding capabilities to the specification based on implementer and stakeholder feedback, including:

support for default comparison precision

support for uncertainty as a type

additional terminology operators (~in and ~contains)

enable consistent error handling and reporting

formalizing JSON serialization of ELM

3) Consider what trial-use aspects of the specification can be considered for normative status