<status value="active"/> <date value="2014-03-26"/> <immutable value="true"/> <compose> <include> <system value="http://terminology.hl7.org/CodeSystem/v3-ActMood"/> <filter> <property value="concept"/> <op value="is-a"/> <value value="_ActMoodPotential"/> </filter> </include> </compose> </ValueSet>

Include codes from http://terminology.hl7.org/CodeSystem/v3-ActMood where concept is-a _ActMoodPotential

<status value="active"/> <date value="2014-03-26"/> <immutable value="true"/> <compose> <include> <system value="http://terminology.hl7.org/CodeSystem/v3-ActMood"/> <filter> <property value="concept"/> <op value="is-a"/> <value value="_ActMoodPotential"/> </filter> </include> </compose> </ValueSet>