<xs:attribute name="scheme" use="required">
<xs:annotation>
<xs:documentation>supplies the name of the language in which the constraints are defined Suggested values include: 1] schematron(Schematron) ; 2] isoschematron(ISO Schematron)</xs:documentation>
</xs:annotation>
<xs:simpleType>
<xs:union>
<xs:simpleType>
<xs:restriction base="xs:token">
<xs:enumeration value="schematron">
<xs:annotation>
<xs:documentation>(Schematron)</xs:documentation>
</xs:annotation>
</xs:enumeration>
</xs:restriction>
</xs:simpleType>
<xs:simpleType>
<xs:restriction base="xs:token">
<xs:enumeration value="isoschematron">
<xs:annotation>
<xs:documentation>(ISO Schematron)</xs:documentation>
</xs:annotation>
</xs:enumeration>
</xs:restriction>
</xs:simpleType>
<xs:simpleType>
<xs:restriction base="xs:token">
<xs:pattern value="(\p{L}|\p{N}|\p{P}|\p{S})+"/>
</xs:restriction>
</xs:simpleType>
</xs:union>
</xs:simpleType>
</xs:attribute> |