---
type: "valueset"
title: "Expression Language"
valueset: "expression-language"
---
# Expression Language

- **Official URL**: http://hl7.org/fhir/ValueSet/expression-language
- **Version**: 4.0.0
- **Status**: active
- **Name**: ExpressionLanguage
- **Title**: Expression Language
- **Publisher**: HL7 International / FHIR Infrastructure
- **Description**: The media type of the expression language.

## Content (Compose)

- **System**: urn:ietf:bcp:13 | **Concepts**: text/cql, text/fhirpath, text/x-fhir-query, text/cql-identifier, text/cql-expression

## ValueSet XML



```xml
<?xml version="1.0" encoding="UTF-8"?>

<ValueSet xmlns="http://hl7.org/fhir">
  <id value="expression-language"/>
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-wg">
    <valueCode value="fhir"/>
  </extension>
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status">
    <valueCode value="normative"/>
  </extension>
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm">
    <valueInteger value="5"/>
  </extension>
  <url value="http://hl7.org/fhir/ValueSet/expression-language"/>
  <identifier>
    <system value="urn:ietf:rfc:3986"/>
    <value value="urn:oid:2.16.840.1.113883.4.642.3.105"/>
  </identifier>
  <version value="4.0.0"/>
  <name value="ExpressionLanguage"/>
  <title value="Expression Language"/>
  <status value="active"/>
  <experimental value="false"/>
  <publisher value="HL7 International / FHIR Infrastructure"/>
  <contact>
    <telecom>
      <system value="url"/>
      <value value="http://www.hl7.org/Special/committees/fiwg"/>
    </telecom>
  </contact>
  <description value="The media type of the expression language."/>
  <immutable value="true"/>
  <compose>
    <include>
      <system value="urn:ietf:bcp:13"/>
      <concept>
        <extension url="http://hl7.org/fhir/StructureDefinition/valueset-concept-definition">
          <valueString value="Clinical Quality Language"/>
        </extension>
        <code value="text/cql"/>
        <display value="CQL"/>
      </concept>
      <concept>
        <extension url="http://hl7.org/fhir/StructureDefinition/valueset-concept-definition">
          <valueString value="FHIRPath"/>
        </extension>
        <code value="text/fhirpath"/>
        <display value="FHIRPath"/>
      </concept>
      <concept>
        <extension url="http://hl7.org/fhir/StructureDefinition/valueset-concept-definition">
          <valueString value="FHIR's RESTful query syntax - typically independent of base URL"/>
        </extension>
        <code value="text/x-fhir-query"/>
        <display value="FHIR Query"/>
      </concept>
      <concept>
        <extension url="http://hl7.org/fhir/StructureDefinition/valueset-concept-definition">
          <valueString value="A Clinical Quality Language identifier, typically the name of a top-level definition within a library"/>
        </extension>
        <code value="text/cql-identifier"/>
        <display value="CQL Identifier"/>
      </concept>
      <concept>
        <extension url="http://hl7.org/fhir/StructureDefinition/valueset-concept-definition">
          <valueString value="A Clinical Quality Language expression,"/>
        </extension>
        <code value="text/cql-expression"/>
        <display value="CQL Expression"/>
      </concept>
    </include>
  </compose>
</ValueSet>
```