98 lines
3.7 KiB
XML
98 lines
3.7 KiB
XML
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<?xml version='1.0'?>
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<!--
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Licensed to the Apache Software Foundation (ASF) under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for additional information regarding copyright ownership.
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The ASF licenses this file to You under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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<!DOCTYPE xs:schema PUBLIC "-//W3C//DTD XMLSCHEMA 200102//EN" "XMLSchema.dtd" >
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<xs:schema targetNamespace="http://www.w3.org/XML/1998/namespace" xmlns:xs="http://www.w3.org/2001/XMLSchema" xml:lang="en">
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<xs:annotation>
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<xs:documentation>
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See http://www.w3.org/XML/1998/namespace.html and
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http://www.w3.org/TR/REC-xml for information about this namespace.
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</xs:documentation>
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</xs:annotation>
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<xs:annotation>
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<xs:documentation>This schema defines attributes and an attribute group
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suitable for use by
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schemas wishing to allow xml:base, xml:lang or xml:space attributes
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on elements they define.
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To enable this, such a schema must import this schema
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for the XML namespace, e.g. as follows:
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<schema . . .>
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. . .
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<import namespace="http://www.w3.org/XML/1998/namespace"
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schemaLocation="http://www.w3.org/2001/03/xml.xsd"/>
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Subsequently, qualified reference to any of the attributes
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or the group defined below will have the desired effect, e.g.
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<type . . .>
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. . .
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<attributeGroup ref="xml:specialAttrs"/>
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will define a type which will schema-validate an instance
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element with any of those attributes</xs:documentation>
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</xs:annotation>
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<xs:annotation>
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<xs:documentation>In keeping with the XML Schema WG's standard versioning
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policy, this schema document will persist at
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http://www.w3.org/2001/03/xml.xsd.
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At the date of issue it can also be found at
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http://www.w3.org/2001/xml.xsd.
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The schema document at that URI may however change in the future,
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in order to remain compatible with the latest version of XML Schema
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itself. In other words, if the XML Schema namespace changes, the version
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of this document at
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http://www.w3.org/2001/xml.xsd will change
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accordingly; the version at
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http://www.w3.org/2001/03/xml.xsd will not change.
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</xs:documentation>
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</xs:annotation>
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<xs:attribute name="lang" type="xs:language">
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<xs:annotation>
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<xs:documentation>In due course, we should install the relevant ISO 2- and 3-letter
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codes as the enumerated possible values . . .</xs:documentation>
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</xs:annotation>
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</xs:attribute>
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<xs:attribute name="space" default="preserve">
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<xs:simpleType>
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<xs:restriction base="xs:NCName">
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<xs:enumeration value="default"/>
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<xs:enumeration value="preserve"/>
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</xs:restriction>
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</xs:simpleType>
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</xs:attribute>
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<xs:attribute name="base" type="xs:anyURI">
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<xs:annotation>
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<xs:documentation>See http://www.w3.org/TR/xmlbase/ for
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information about this attribute.</xs:documentation>
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</xs:annotation>
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</xs:attribute>
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<xs:attributeGroup name="specialAttrs">
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<xs:attribute ref="xml:base"/>
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<xs:attribute ref="xml:lang"/>
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<xs:attribute ref="xml:space"/>
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</xs:attributeGroup>
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</xs:schema>
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