This value set includes codes based on the following rules:

 <status value="active"/> <experimental value="false"/> <date value="2014-03-26"/> <description value="Identifies what sort of change is permitted or has occurred between the item that was ordered/requested and the one that was/will be provided."/> <compose> <include> <system value="http://terminology.hl7.org/CodeSystem/v3-SubstitutionCondition"/> <concept> <code value="NOSUB"/> </concept> <concept> <code value="UNCOND"/> </concept> </include> <include> <valueSet value="http://terminology.hl7.org/ValueSet/v3-Conditional"/> </include> <include> <valueSet value="http://terminology.hl7.org/ValueSet/v3-xSubstitutionConditionNoneOrUnconditional"/> </include> </compose> </ValueSet>