<xs:simpleType name="SignificantDimensionEnumType">
  <xs:annotation>
    <xs:documentation>The SignificantDimensionEnumType enumerates values that signify which aspect of a measured dimension is significant to a tolerance evaluation. SX = maximum size SN = minimum size SA = average size SM = median size SD = mid-range size SR = range of sizes SQ = standard deviation of sizes</xs:documentation>
  </xs:annotation>
  <xs:restriction base="xs:NMTOKEN">
    <xs:enumeration value="SX"/>
    <xs:enumeration value="SN"/>
    <xs:enumeration value="SA"/>
    <xs:enumeration value="SM"/>
    <xs:enumeration value="SD"/>
    <xs:enumeration value="SR"/>
    <xs:enumeration value="SQ"/>
  </xs:restriction>
</xs:simpleType>