<status value="active"/> <experimental value="false"/> <date value="2014-03-26"/> <description value="The actual value is not an element in the value domain of a variable. (e.g., concept not provided by required code system)."/> <compose> <include> <system value="http://terminology.hl7.org/CodeSystem/v3-NullFlavor"/> <filter> <property value="concept"/> <op value="is-a"/> <value value="OTH"/> </filter> </include> </compose> </ValueSet>