|FHIR Infrastructure Work Group||Maturity Level : N||Normative (from v4.0.0)||Use Context : Any|
|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.
A set of flags that defines how references are supported.
|Committee:||FHIR Infrastructure Work Group|
|Source Resource||XML / JSON|
This Code system is used in the following value sets:
|literal||Literal References||The server supports and populates Literal references (i.e. using Reference.reference) where they are known (this code does not guarantee that all references are literal; see 'enforced').|
|logical||Logical References||The server allows logical references (i.e. using Reference.identifier).|
|resolves||Resolves References||The server will attempt to resolve logical references to literal references - i.e. converting Reference.identifier to Reference.reference (if resolution fails, the server may still accept resources; see logical).|
|enforced||Reference Integrity Enforced||The 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.|
|local||Local References Only||The server does not support references that point to other servers.|
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|