<status value="active" /> <compose> <include> <system value="http://unitsofmeasure.org" /> <concept> <code value="s" /> <display value="seconds" /> </concept> <concept> <code value="min" /> <display value="minutes" /> </concept> <concept> <code value="h" /> <display value="hours" /> </concept> </include> </compose> </ValueSet>