This page is part of the FHIR Specification (v3.2.0: R4 Ballot 1). 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: R4 R3 R2
. Page versions: R4 R3 R2
| FHIR Infrastructure  Work Group | Maturity Level: 3 | Normative | Use Context: Any | 
Normative Candidate Note: This page is candidate normative content for R4 in the Conformance Package. Once normative, it will lose it's Maturity Level, and breaking changes will no longer be made.
This is a value set defined by the FHIR project.
Summary
| Defining URL: | http://hl7.org/fhir/ValueSet/unknown-content-code | 
| Name: | UnknownContentCode | 
| Definition: | A code that indicates whether an application accepts unknown elements or extensions when reading resources. | 
| Committee: | FHIR Infrastructure  Work Group | 
| OID: | 2.16.840.1.113883.4.642.3.196 (for OID based terminology systems) | 
| Source Resource | XML / JSON | 
This value set is used in the following places:
This value set includes codes from the following code systems:
http://hl7.org/fhir/unknown-content-code
This expansion generated 20 Dec 2017
This value set contains 4 concepts
Expansion based on http://hl7.org/fhir/unknown-content-code version 3.2.0
All codes from system http://hl7.org/fhir/unknown-content-code
| Code | Display | Definition | 
| no | Neither Elements or Extensions | The application does not accept either unknown elements or extensions. | 
| extensions | Unknown Extensions | The application accepts unknown extensions, but not unknown elements. | 
| elements | Unknown Elements | The application accepts unknown elements, but not unknown extensions. | 
| both | Unknown Elements and Extensions | The application accepts unknown elements and extensions. | 
See the full registry of value sets defined as part of FHIR.
Explanation of the columns that may appear on this page:
| Lvl | A few code lists that FHIR defines are hierarchical - each code is assigned a level. For value sets, levels are mostly used to organise codes for user convenience, but may follow code system hierarchy - 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 |