<status value="active"/> <experimental value="false"/> <date value="2014-03-26"/> <description value="A relationship in which the target act is referred to by the source act. This permits a simple reference relationship that distinguishes between the referent and the referee."/> <immutable value="true"/> <compose> <include> <system value="http://terminology.hl7.org/CodeSystem/v3-ActRelationshipType"/> <filter> <property value="concept"/> <op value="is-a"/> <value value="REFR"/> </filter> </include> </compose> </ValueSet>

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