<status value="active"/> <experimental value="false"/> <date value="2021-01-17T07:06:13+11:00"/> <publisher value="HL7 (FHIR Project)"/> <contact> <telecom> <system value="url"/> <value value="http://hl7.org/fhir"/> </telecom> <telecom> <system value="email"/> <value value="fhir@lists.hl7.org"/> </telecom> </contact> <description value="A set of flags that defines how references are supported."/> <caseSensitive value="true"/> <valueSet value="http://hl7.org/fhir/ValueSet/reference-handling-policy"/> <content value="complete"/> <concept> <code value="literal"/> <display value="Literal References"/> <definition value="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')."/> </concept> <concept> <code value="logical"/> <display value="Logical References"/> <definition value="The server allows logical references (i.e. using Reference.identifier)."/> </concept> <concept> <code value="resolves"/> <display value="Resolves References"/> <definition value="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)."/> </concept> <concept> <code value="enforced"/> <display value="Reference Integrity Enforced"/> <definition value="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."/> </concept> <concept> <code value="local"/> <display value="Local References Only"/> <definition value="The server does not support references that point to other servers."/> </concept> </CodeSystem>

ReferenceHandlingPolicy

A set of flags that defines how references are supported.

This code system http://hl7.org/fhir/reference-handling-policy defines the following codes:

Code	Display	Definition
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.