<xs:simpleType name="AssociatedTolerancedFeatureSpecificationElementEnumType">
  <xs:annotation>
    <xs:documentation>The AssociatedTolerancedFeatureSpecificationElementEnumType enumerates values that describe ISO specific circled substitute feature characteristic modifiers. C = minimax (Chebyshev) G = least squares (Gaussian) N = maximum inscribed T = tangent plane X = minimum circumscribed</xs:documentation>
  </xs:annotation>
  <xs:restriction base="xs:NMTOKEN">
    <xs:enumeration value="C"/>
    <xs:enumeration value="G"/>
    <xs:enumeration value="N"/>
    <xs:enumeration value="T"/>
    <xs:enumeration value="X"/>
  </xs:restriction>
</xs:simpleType>