<status value="draft"/> <experimental value="false"/> <date value="2020-02-24T12:41:39+11:00"/> <publisher value="HL7 Orders and Observations Workgroup"/> <contact> <telecom> <system value="url"/> <value value="http://www.hl7.org/Special/committees/orders/index.cfm"/> </telecom> </contact> <description value="Substance category codes"/> <immutable value="true"/> <compose> <include> <system value="http://terminology.hl7.org/CodeSystem/substance-category"/> </include> </compose> </ValueSet>