<status value="active"/><experimental value="false"/><date value="2021-01-05T10:01:24+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="Used to distinguish different roles a resource can play within a set of linked resources."/><jurisdiction><coding><system value="http://unstats.un.org/unsd/methods/m49/m49.htm"/><code value="001"/><display value="World"/></coding></jurisdiction><caseSensitive value="true"/><valueSet value="http://hl7.org/fhir/ValueSet/linkage-type"/><content value="complete"/><concept><code value="source"/><display value="Source of Truth"/><definition value="The resource represents the "source of truth" (from the perspective of this Linkage resource) for the underlying event/condition/etc."/></concept><concept><code value="alternate"/><display value="Alternate Record"/><definition value="The resource represents an alternative view of the underlying event/condition/etc. The resource may still be actively maintained, even though it is not considered to be the source of truth."/></concept><concept><code value="historical"/><display value="Historical/Obsolete Record"/><definition value="The resource represents an obsolete record of the underlying event/condition/etc. It is not expected to be actively maintained."/></concept></CodeSystem>

This code system http://hl7.org/fhir/linkage-type defines the following codes:

Code	Display	Definition
source	Source of Truth	The resource represents the "source of truth" (from the perspective of this Linkage resource) for the underlying event/condition/etc.
alternate	Alternate Record	The resource represents an alternative view of the underlying event/condition/etc. The resource may still be actively maintained, even though it is not considered to be the source of truth.
historical	Historical/Obsolete Record	The resource represents an obsolete record of the underlying event/condition/etc. It is not expected to be actively maintained.