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<?xml version='1.0'?>
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<?xml-stylesheet href="../../2008/09/xsd.xsl" type="text/xsl"?>
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<xs:schema targetNamespace="http://www.w3.org/XML/1998/namespace"
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xmlns:xs="http://www.w3.org/2001/XMLSchema"
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xmlns ="http://www.w3.org/1999/xhtml"
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xml:lang="en">
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<xs:annotation>
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<xs:documentation>
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<div>
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<h1>About the XML namespace</h1>
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<div class="bodytext">
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<p>
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This schema document describes the XML namespace, in a form
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suitable for import by other schema documents.
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</p>
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<p>
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See <a href="http://www.w3.org/XML/1998/namespace.html">
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http://www.w3.org/XML/1998/namespace.html</a> and
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<a href="http://www.w3.org/TR/REC-xml">
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http://www.w3.org/TR/REC-xml</a> for information
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about this namespace.
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</p>
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<p>
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Note that local names in this namespace are intended to be
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defined only by the World Wide Web Consortium or its subgroups.
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The names currently defined in this namespace are listed below.
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They should not be used with conflicting semantics by any Working
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Group, specification, or document instance.
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</p>
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<p>
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See further below in this document for more information about <a
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href="#usage">how to refer to this schema document from your own
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XSD schema documents</a> and about <a href="#nsversioning">the
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namespace-versioning policy governing this schema document</a>.
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</p>
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</div>
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</div>
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</xs:documentation>
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</xs:annotation>
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<xs:attribute name="lang">
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<xs:annotation>
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<xs:documentation>
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<div>
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<h3>lang (as an attribute name)</h3>
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<p>
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denotes an attribute whose value
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is a language code for the natural language of the content of
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any element; its value is inherited. This name is reserved
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by virtue of its definition in the XML specification.</p>
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</div>
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<div>
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<h4>Notes</h4>
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<p>
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Attempting to install the relevant ISO 2- and 3-letter
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codes as the enumerated possible values is probably never
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going to be a realistic possibility.
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</p>
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<p>
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See BCP 47 at <a href="http://www.rfc-editor.org/rfc/bcp/bcp47.txt">
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http://www.rfc-editor.org/rfc/bcp/bcp47.txt</a>
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and the IANA language subtag registry at
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<a href="http://www.iana.org/assignments/language-subtag-registry">
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http://www.iana.org/assignments/language-subtag-registry</a>
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for further information.
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</p>
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<p>
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The union allows for the 'un-declaration' of xml:lang with
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the empty string.
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</p>
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</div>
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</xs:documentation>
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</xs:annotation>
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<xs:simpleType>
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<xs:union memberTypes="xs:language">
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<xs:simpleType>
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<xs:restriction base="xs:string">
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<xs:enumeration value=""/>
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</xs:restriction>
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</xs:simpleType>
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</xs:union>
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</xs:simpleType>
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</xs:attribute>
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<xs:attribute name="space">
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<xs:annotation>
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<xs:documentation>
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<div>
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<h3>space (as an attribute name)</h3>
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<p>
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denotes an attribute whose
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value is a keyword indicating what whitespace processing
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discipline is intended for the content of the element; its
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value is inherited. This name is reserved by virtue of its
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definition in the XML specification.</p>
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</div>
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</xs:documentation>
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</xs:annotation>
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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"> <xs:annotation>
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<xs:documentation>
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<div>
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<h3>base (as an attribute name)</h3>
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<p>
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denotes an attribute whose value
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provides a URI to be used as the base for interpreting any
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relative URIs in the scope of the element on which it
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appears; its value is inherited. This name is reserved
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by virtue of its definition in the XML Base specification.</p>
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<p>
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See <a
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href="http://www.w3.org/TR/xmlbase/">http://www.w3.org/TR/xmlbase/</a>
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for information about this attribute.
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</p>
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</div>
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</xs:documentation>
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</xs:annotation>
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</xs:attribute>
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<xs:attribute name="id" type="xs:ID">
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<xs:annotation>
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<xs:documentation>
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<div>
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<h3>id (as an attribute name)</h3>
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<p>
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denotes an attribute whose value
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should be interpreted as if declared to be of type ID.
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This name is reserved by virtue of its definition in the
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xml:id specification.</p>
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<p>
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See <a
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href="http://www.w3.org/TR/xml-id/">http://www.w3.org/TR/xml-id/</a>
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for information about this attribute.
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</p>
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</div>
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</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:attribute ref="xml:id"/>
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</xs:attributeGroup>
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<xs:annotation>
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<xs:documentation>
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<div>
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<h3>Father (in any context at all)</h3>
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<div class="bodytext">
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<p>
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denotes Jon Bosak, the chair of
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the original XML Working Group. This name is reserved by
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the following decision of the W3C XML Plenary and
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XML Coordination groups:
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</p>
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<blockquote>
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<p>
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In appreciation for his vision, leadership and
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dedication the W3C XML Plenary on this 10th day of
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February, 2000, reserves for Jon Bosak in perpetuity
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the XML name "xml:Father".
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</p>
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</blockquote>
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</div>
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</div>
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</xs:documentation>
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</xs:annotation>
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<xs:annotation>
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<xs:documentation>
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<div xml:id="usage" id="usage">
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<h2><a name="usage">About this schema document</a></h2>
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<div class="bodytext">
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<p>
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This schema defines attributes and an attribute group suitable
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for use by schemas wishing to allow <code>xml:base</code>,
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<code>xml:lang</code>, <code>xml:space</code> or
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<code>xml:id</code> attributes on elements they define.
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</p>
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<p>
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To enable this, such a schema must import this schema for
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the XML namespace, e.g. as follows:
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</p>
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<pre>
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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/xml.xsd"/>
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</pre>
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<p>
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or
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</p>
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<pre>
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<import namespace="http://www.w3.org/XML/1998/namespace"
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schemaLocation="http://www.w3.org/2009/01/xml.xsd"/>
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</pre>
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<p>
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Subsequently, qualified reference to any of the attributes or the
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group defined below will have the desired effect, e.g.
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</p>
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<pre>
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<type . . .>
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. . .
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<attributeGroup ref="xml:specialAttrs"/>
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</pre>
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<p>
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will define a type which will schema-validate an instance element
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with any of those attributes.
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</p>
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</div>
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</div>
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</xs:documentation>
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</xs:annotation>
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<xs:annotation>
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<xs:documentation>
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<div id="nsversioning" xml:id="nsversioning">
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<h2><a name="nsversioning">Versioning policy for this schema document</a></h2>
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<div class="bodytext">
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<p>
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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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<a href="http://www.w3.org/2009/01/xml.xsd">
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http://www.w3.org/2009/01/xml.xsd</a>.
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</p>
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<p>
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At the date of issue it can also be found at
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<a href="http://www.w3.org/2001/xml.xsd">
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http://www.w3.org/2001/xml.xsd</a>.
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</p>
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<p>
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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
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Schema itself, or with the XML namespace itself. In other words,
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if the XML Schema or XML namespaces change, the version of this
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document at <a href="http://www.w3.org/2001/xml.xsd">
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http://www.w3.org/2001/xml.xsd
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</a>
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will change accordingly; the version at
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<a href="http://www.w3.org/2009/01/xml.xsd">
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http://www.w3.org/2009/01/xml.xsd
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</a>
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will not change.
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</p>
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<p>
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Previous dated (and unchanging) versions of this schema
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document are at:
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</p>
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<ul>
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<li><a href="http://www.w3.org/2009/01/xml.xsd">
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http://www.w3.org/2009/01/xml.xsd</a></li>
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<li><a href="http://www.w3.org/2007/08/xml.xsd">
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http://www.w3.org/2007/08/xml.xsd</a></li>
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<li><a href="http://www.w3.org/2004/10/xml.xsd">
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http://www.w3.org/2004/10/xml.xsd</a></li>
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<li><a href="http://www.w3.org/2001/03/xml.xsd">
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http://www.w3.org/2001/03/xml.xsd</a></li>
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</ul>
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</div>
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</div>
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</xs:documentation>
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</xs:annotation>
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</xs:schema>
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