Clinical Quality Language Specification
2.0.0-ballot - R2 STU 1 (Ballot)

Clinical Quality Language Specification, published by Clinical Decision Support WG. This guide is not an authorized publication; it is the continuous build for version 2.0.0-ballot built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/cql/ and changes regularly. See the Directory of published versions

## ELM

Page standards status: Normative | Maturity Level: N

Expression Logical Model Schema Files are available here:

expression.xsd - Base expression schema

clinicalexpression.xsd - Clinical extensions to the base schema

cqlannotations.xsd - Cql annotations schema for including CQL source in ELM libraries

library.xsd - Library container schema

XML Types schema that defines CQL system types in an XML schema:

types.xsd

Model Info schema is available here:

modelinfo.xsd - Model info schema used by translation tooling to define model structures

> NOTE: Model info is an implementation detail included here for convenience, it is not a normative part of the CQL specification.