<xs:simpleType name="MatrixCementKind"><xs:annotation><xs:documentation>Lithology matrix/cement description. The list of standard values is contained in the WITSML enumValues.xml file.</xs:documentation></xs:annotation><xs:restriction base="eml:TypeEnum"><xs:enumeration value="ankerite"/><xs:enumeration value="calcite"/><xs:enumeration value="chlorite"/><xs:enumeration value="dolomite"/><xs:enumeration value="illite"/><xs:enumeration value="kaolinite"/><xs:enumeration value="quartz"/><xs:enumeration value="siderite"/><xs:enumeration value="smectite"/></xs:restriction></xs:simpleType>