This optional "REASON" actRelationship is used to relate a referenced DICOM composite object (SopInstance ActClass) with the PurposeOfReference ActClass that includes the coded purpose(s) of reference.
ActRelationship Clone name: entryRelationship (replaces REASON)
ActRelationship.typeCode: x_ActRelationshipEntry (Constraint: Fixed value = RSON)
ActRelationship.contextControlCode: "AP" (Additive Propagating)
ContextConductionInd: "true"