<xs:simpleType name="WeldSupplementarySymbolEnumType"><xs:annotation><xs:documentation>The WeldSupplementarySymbolEnumType enumerates values that describe the supplementary symbol for a one-sided groove weld characteristic.</xs:documentation></xs:annotation><xs:restriction base="xs:string"><xs:enumeration value="BACK_WELD"/><xs:enumeration value="MELT_THROUGH"/><xs:enumeration value="CONSUMABLE_INSERT"/><xs:enumeration value="REMOVABLE_BACKING"/></xs:restriction></xs:simpleType>