<status value="draft"/> <experimental value="false"/> <publisher value="FHIR Project team"/> <contact> <telecom> <system value="url"/> <value value="http://hl7.org/fhir"/> </telecom> </contact> <description value="Unified Code for Units of Measure (UCUM). This value set includes all possible UCUM codes used for time measures (Age, Duration etc.) - that it is, all units which have the same canonical unit as 'a' (year)"/> <copyright value="The UCUM codes, UCUM table (regardless of format), and UCUM Specification are copyright © 1999-2009, Regenstrief Institute, Inc. and the Unified Codes for Units of Measures (UCUM) Organization. All rights reserved."/> <compose> <include> <system value="http://unitsofmeasure.org"/> <filter> <property value="canonical"/> <op value="="/> <value value="a"/> </filter> </include> </compose> </ValueSet>