<status value="active"/> <date value="2014-03-26"/> <description value="The presence of an bio-chemical entity (substance) at a location or environment, such as an ingredient in a mixture, molecular part of a complex, a located entity at a cellular structure, or content of a container, such as a vesicle."/> <compose> <include> <system value="http://terminology.hl7.org/CodeSystem/v3-RoleClass"/> <filter> <property value="concept"/> <op value="is-a"/> <value value="CONT"/> </filter> <filter> <property value="concept"/> <op value="is-a"/> <value value="INGR"/> </filter> <filter> <property value="concept"/> <op value="is-a"/> <value value="LOCE"/> </filter> <filter> <property value="concept"/> <op value="is-a"/> <value value="PART"/> </filter> </include> </compose> </ValueSet>