The optional RelativePartVariation element is the part variation relative to the size of the tolerance zone corresponding to the "REL_PV" StatsValuesEnumType enumeration.
<xs:element name="RelativePartVariation" type="StatsMeasuredDecimalType" substitutionGroup="NumericCharacteristicWithTolStatsValue"><xs:annotation><xs:documentation>The optional RelativePartVariation element is the part variation relative to the size of the tolerance zone corresponding to the "REL_PV" StatsValuesEnumType enumeration.</xs:documentation></xs:annotation></xs:element>