Pset_FlowMeterOccurrence Flow meter occurrence common attributes. IfcFlowMeter IfcFlowMeter Purpose Enumeration defining the purpose of the flow meter occurrence. MASTER SUBMASTER SUBMETER OTHER NOTKNOWN UNSET MASTER Master SUBMASTER Submaster SUBMETER Submeter OTHER (other) Value is not listed. NOTKNOWN (unknown) Value is unknown. UNSET (unset) Value has not been specified. Purpose