Release 4 FHIR CI-Build

This page is part of the Continuous Integration Build of FHIR Specification (v4.0.1: R4 - Mixed Normative and STU ) in it's permanent home (it will always (will be available incorrect/inconsistent at this URL). The current version which supercedes this version is 5.0.0 . For a full list of available versions, see times).
See the Directory of published versions icon . Page versions: R5 R4B R4

Using Codes Code Systems Value Sets Concept Maps Identifier Systems

4.3.14.385 4.3.2.233 Code System CodeSystem http://hl7.org/fhir/extension-context-type

  Maturity Level : N
Responsible Owner: FHIR Infrastructure icon Work Group Normative (from v4.0.0) Use Context : Any Country: World
This page has been approved as part of an ANSI standard. See the Conformance Package for further details. This is a code system defined by the FHIR project. Summary Committee:
Official URL : Title: http://hl7.org/fhir/extension-context-type ExtensionContextType Definition: How an extension context is interpreted. Version : 6.0.0-ballot3
active as of 2021-01-04 FHIR Infrastructure Computable Name : ExtensionContextType Work Group
OID: 2.16.840.1.113883.4.642.4.1013 (for OID based terminology systems) Flags : CaseSensitive, Complete. All codes ValueSet: Extension Context Type Source Resource XML / JSON OID : 2.16.840.1.113883.4.642.4.1013

This Code system is used in the following FHIR core-defined or referenced value sets:

4.3.14.385.1 4.3.2.233.1 Content Definition

How an extension context is interpreted.

4.3.14.385.2 4.3.2.233.2 ExtensionContextType Content

How an extension context is interpreted.

Generated Narrative: CodeSystem extension-context-type

Last updated: 2025-12-17T09:50:17.012Z

This case-sensitive code system http://hl7.org/fhir/extension-context-type defines the following codes:

Code Display Definition Copy
fhirpath FHIRPath

The context is all elements that match the FHIRPath query found in the expression.

btn   btn
element Element ID

The context is any element that has an ElementDefinition.id that matches that found in the expression. This includes ElementDefinition Ids that have slicing identifiers. identifiers, and also includes specialization logic (see Extension Context ). The full path for the element is [url]#[elementid]. If there is no #, the Element id is one defined in the base specification. When an element has assigned type, the type is also an assigned id for this element, which means that the type can also be used here.

btn   btn
extension Extension URL

The context is a particular extension from a particular StructureDefinition, and the expression is just a uri that identifies the extension.

btn   btn

 

See the full registry of code systems defined as part of FHIR.

Explanation of the columns that may appear on this page:

Level A few code lists that FHIR defines are hierarchical - each code is assigned a level. See Code System for further information.
Source The source of the definition of the code (when the value set draws in codes defined elsewhere)
Code The code (used as the code in the resource instance). If the code is in italics, this indicates that the code is not selectable ('Abstract')
Display The display (used in the display element of a Coding ). If there is no display, implementers should not simply display the code, but map the concept into their application
Definition An explanation of the meaning of the concept
Comments Additional notes about how to use the code