UPDM — PerformanceMeasureSet/ PerformanceParameterSet/ PerformanceParameterTyp

· PerformanceMeasureSet also turns up as PerformanceMeasurementSet in a number of places and the correct term therefore needs to be established.
· The attributes make use of the entity PerformanceMeasurementPeriod which does not appear anywhere else in the document.
· The descriptions of all of these seem somewhat circular and could do with some modification: PerformanceMeasureSet ="This stereotype (PerformanceMeasureSet) is applied to instances of classes stereotyped PerformanceParameterSet". PerformanceParameterSet = "This stereotype is applied to PerformanceMeasurementSet in the UPDM class library".