<status value="active"/> <experimental value="false"/> <date value="2014-03-26"/> <description value="Interpretation of degree of abnormality (including critical or "alert" level). Concepts in this category are mutually exclusive, i.e., at most one is allowed."/> <compose> <include> <system value="http://terminology.hl7.org/CodeSystem/v3-ObservationInterpretation"/> <filter> <property value="concept"/> <op value="is-a"/> <value value="A"/> </filter> </include> </compose> </ValueSet>