DSTU2 QA Preview

This page is part of the FHIR Specification (v1.0.0: DSTU 2 Ballot 3). The current version which supercedes this version is 5.0.0. For a full list of available versions, see the Directory of published versions . Page versions: R5 R4B R4 R3 R2

1.17.3 Extension - Detailed Descriptions

FHIR Infrastructure Work GroupMaturity Level: N/ABallot Status: DSTU 2
Extension
Definition

Optional Extensions Element - found in all resources.

Control1..1
Requirements

The ability to add extensions in a structured way is what keeps FHIR resources simple.

Extension.url
Definition

Source of the definition for the extension code - a logical name or a URL.

Control1..1
Typeuri
Comments

The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition should be version specific. This will ideally be the URI for the Resource Profile defining the extension, with the code for the extension after a #.

Extension.value[x]
Definition

Value of extension - may be a resource or one of a constrained set of the data types (see Extensibility in the spec for list).

Control0..1
Type*
[x] NoteSee Choice of Data Types for further information about how to use [x]