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- <?xml version="1.0"?>
- <xs:schema targetNamespace="http://www.w3.org/XML/1998/namespace" xmlns:xs="http://www.w3.org/2001/XMLSchema" xml:lang="en">
- <xs:annotation>
- <xs:documentation>This schema defines attributes and an attribute group
- suitable for use by
- schemas wishing to allow xml:lang or xml:space attributes
- on elements they define.
-
- To enable this, such a schema must import this schema
- for the XML namespace, e.g. as follows:
- <schema . . .>
- . . .
- <import namespace="http://www.w3.org/XML/1998/namespace"
- schemaLocation="http://www.w3.org/2001/03/xml.xsd"/>
-
- Subsequently, qualified reference to either of the attributes
- or the group defined below will have the desired effect, e.g.
-
- <type . . .>
- . . .
- <attributeGroup ref="xml:specialAttrs"/>
-
- will define a type which will schema-validate a instance
- element with both xml:space and xml:lang attribute</xs:documentation>
- </xs:annotation>
- <xs:attribute name="lang" type="xs:language">
- <xs:annotation>
- <xs:documentation>In due course, we should install the relevant ISO 2- and 3-letter
- codes as the enumerated possible values . . .</xs:documentation>
- </xs:annotation>
- </xs:attribute>
- <xs:attribute name="space" default="preserve">
- <xs:simpleType>
- <xs:restriction base="xs:NCName">
- <xs:enumeration value="default"/>
- <xs:enumeration value="preserve"/>
- </xs:restriction>
- </xs:simpleType>
- </xs:attribute>
- <xs:attributeGroup name="specialAttrs">
- <xs:attribute ref="xml:lang"/>
- <xs:attribute ref="xml:space"/>
- </xs:attributeGroup>
- </xs:schema>
-