This value set includes codes based on the following rules:

<status value="retired"/> <experimental value="false"/> <date value="2014-03-26"/> <description value="A value representing the state (solid, liquid, gas) and nature of the material."/> <compose> <include> <system value="http://terminology.hl7.org/CodeSystem/v3-MaterialForm"/> </include> <include> <valueSet value="http://terminology.hl7.org/ValueSet/v3-OrderableDrugForm"/> </include> </compose> </ValueSet>