Using CQL with FHIR
1.0.0 - STU1 International flag

Using CQL with FHIR, published by HL7 International / Clinical Decision Support. This guide is not an authorized publication; it is the continuous build for version 1.0.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/cql-ig/ and changes regularly. See the Directory of published versions

Artifacts Summary

This page provides a list of the FHIR artifacts defined as part of this implementation guide.

Behavior: Capability Statements

The following artifacts define the specific capabilities that different types of systems are expected to have in order to comply with this implementation guide. Systems conforming to this implementation guide are expected to declare conformance to one or more of the following capability statements.

CQL Evaluation Service

Capability statement for a service supporting CQL evaluation use cases

Behavior: Operation Definitions

These are custom operations that can be supported by and/or invoked by systems conforming to this implementation guide.

CQL CQL

The $cql operation evaluates a CQL expression and returns the result. The operation has a single return parameter that can be of any type to accommodate the possible result types of a CQL expression.

CQL Library Evaluate

Evaluates the contents of a library and returns the results as a Parameters resource.

Structures: Resource Profiles

These define constraints on FHIR resources for systems conforming to this implementation guide.

CQL Capability Statement

The CQL Capability Statement Profile enables capability statements to express supported CQL versions.

CQL Evaluation Result

The CQL Evaluation Result profile supports using the dataAbsentReason extension to indicate null evaluation results from operations.

CQL ImplementationGuide

Supports the description of model info configuration information as part of an implementation guide

CQL Library

The CQL Library profile defines conformance expectations for the use of a FHIR Library resource as a wrapper for a Clinical Quality Language (CQL) library

CQL Model Info

The CQL Model Information profile supports the FHIR representation and distribution of CQL ModelInfo such as the FHIR Model Info Library

CQL Model Info Settings

CQL ModelInfo settings expressed using FHIR Parameters

CQL Module

The CQL Module profile describes the elements used to provide a structured representation of the declarations and data requirements of a logic library or operation

CQL Options

A parameters profile that defines supported CQL-to-ELM translator options used to translate CQL. Complete documentation of these options can be found in the Usage topic of the CQL-to-ELM translator overview.

CQL StructureDefinition

Supports configuration of model info information for a StructureDefinition

ELM JSON Library

The ELM Library supports distributing a Clinical Quality Language (CQL) library compiled to Expression Logical Model (ELM) in JSON format

ELM XML Library

The ELM CQL Library supports distributing a Clinical Quality Language (CQL) library compiled to Expression Logical Model (ELM) in XML format

Example: Example Instances

These are example instances that show what data produced and consumed by systems conforming with this implementation guide might look like.

ANC Cohort

Example cohort definition for anteantal care

CQL Example

Example CQL Library illustrating the CQL Profile (a Library with only text/cql content)

CQL IG Example Code System

This code system contains example content used to support examples in the Using CQL IG

CQL ImplementationGuide Example

This implementation guide demonstrates the use of modelinfo settings

Danger signs

Before each contact, the health worker should check whether the woman has any of the danger signs listed here – if yes, she should refer to the hospital urgently; if no, she should continue to the normal contact

ELM Example

Example ELM library demonstrating the ELM XML and ELM JSON profiles (a CQL library with only ELM)

Example

Example CQL Library used to demonstrate common patterns used in CQL with FHIR-based models

Example CQL Operations Parameters

Example Parameters resource demonstrating the use of the CQLOptions profile to specify CQL translator options. This resource would typically be a contained resource in an implementation guide, artifact collection, or library.

Example Danger Signs - Central cyanosis Codes

Codes representing possible values for the Danger Signs - Central cyanosis element

Example Danger Signs - No danger signs Codes

Codes representing possible values for the Danger Signs - No danger signs element

Example Danger signs Codes

Codes representing possible values for the Danger signs element

Example Danger signs Codes Grouper

Group Valueset with codes representing possible values for the Danger signs Codes Grouper element

Example Evaluation Result Parameters

Example Parameters resource demonstrating the use of data-absent-reason extension to indicate a null evaluation result.

Example Logic Library - Module Definition

This library is used as an example module definition in the Using FHIR with CQL Implementation Guide

Example ModelInfo Settings Parameters

Example Parameters resource demonstrating the use of ModelInfo configuration parameters. This resource would typically be a contained resource in an implementation guide or artifact collection.

Example Negation Observation

Example Observation resource illustrating negation and the use of the notDoneValueSet extension.

Example Patient

Example Patient resource used as part of the observation negation example.

Example Specific health concern(s) Codes

Codes representing possible values for the Specific health concern(s) element

Example Type Mapping Evaluation Result Parameters

Example Parameters resource showing the result of evaluating the TypeMappingExample library, demonstrating all possible CQL-to-FHIR type mappings.

Library Evaluation Service Capability Statement Example

Basic conformance statement for a Library Evaluation Service. A server can support more functionality than defined here, but this is the minimum amount

Parameter Example

Example CQL library with a parameter defined, used to illustrate calling the $cql and Library/$evaluate operations with libraries that have parameters

Specific health concern(s)

If the woman came to the facility with a specific health concern, select the health concern(s) from the list

Type Mapping Example

Example CQL library providing a complete set of expressions that cover all possible CQL and FHIR Type Mapping, for both input and output. See the Type Mapping Evaluation Result example for an illustration of the type mapping in a Parameters resource.

USCore Model Definition

Model definition for USCore (v3.1.0) Model