<xs:simpleType name="LimitsAndFitsZoneVarianceType"><xs:annotation><xs:documentation>The LimitsAndFitsZoneVarianceType enumerates values that describe the zone variance portion of a limits and fits specification.</xs:documentation></xs:annotation><xs:restriction base="xs:NMTOKEN"><xs:enumeration value="HOLE"/><xs:enumeration value="SHAFT"/></xs:restriction></xs:simpleType>