Current Build Value Set

FHIR Infrastructure Work Group Maturity Level: 3Normative 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.


Defining URL:

A set of flags that defines how references are supported.

Committee:FHIR Infrastructure Work Group
OID:2.16.840.1.113883.4.642.3.202 (for OID based terminology systems)
Source ResourceXML / JSON

This value set is used in the following places:

This value set includes codes from the following code systems:


This expansion generated 17 Jan 2018

This value set contains 5 concepts

Expansion based on version 3.2.0

All codes from system

literalLiteral ReferencesThe server supports and populates Literal references where they are known (this code does not guarantee that all references are literal; see 'enforced')
logicalLogical ReferencesThe server allows logical references
resolvesResolves ReferencesThe server will attempt to resolve logical references to literal references (if resolution fails, the server may still accept resources; see logical)
enforcedReference Integrity EnforcedThe server enforces that references have integrity - e.g. it ensures that references can always be resolved. This is typically the case for clinical record systems, but often not the case for middleware/proxy systems
localLocal References OnlyThe server does not support references that point to other servers


See the full registry of value sets defined as part of FHIR.

Explanation of the columns that may appear on this page:

LvlA 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
SourceThe source of the definition of the code (when the value set draws in codes defined elsewhere)
CodeThe code (used as the code in the resource instance). If the code is in italics, this indicates that the code is not selectable ('Abstract')
DisplayThe 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
DefinitionAn explanation of the meaning of the concept
CommentsAdditional notes about how to use the code