Associates a derived Act with its input parameters. E.G., an anion-gap observation can be associated as being derived from given sodium-, (potassium-,), chloride-, and bicarbonate-observations. The narrative content (Act.text) of a source act is wholly machine-derived from the collection of target acts.
\nhttp://terminology.hl7.org/CodeSystem/v3-ActRelationshipType
where concept is-a DRIV