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<?xml version='1.0'?>

<?xml-stylesheet href="../2008/09/xsd.xsl" type="text/xsl"?>

<xs:schema targetNamespace="http://www.w3.org/XML/1998/namespace"

  xmlns:xs="http://www.w3.org/2001/XMLSchema"

  xmlns   ="http://www.w3.org/1999/xhtml"

  xml:lang="en">

 <xs:annotation>

  <xs:documentation>

   <div>

    <h1>About the XML namespace</h1>

    <div class="bodytext">

     <p>

      This schema document describes the XML namespace, in a form

      suitable for import by other schema documents.

     </p>

     <p>

      See <a href="http://www.w3.org/XML/1998/namespace.html">

      http://www.w3.org/XML/1998/namespace.html</a> and

      <a href="http://www.w3.org/TR/REC-xml">

      http://www.w3.org/TR/REC-xml</a> for information

      about this namespace.

     </p>

     <p>

      Note that local names in this namespace are intended to be

      defined only by the World Wide Web Consortium or its subgroups.

      The names currently defined in this namespace are listed below.

      They should not be used with conflicting semantics by any Working

      Group, specification, or document instance.

     </p>

     <p>

      See further below in this document for more information about <a

      href="#usage">how to refer to this schema document from your own

      XSD schema documents</a> and about <a href="#nsversioning">the

      namespace-versioning policy governing this schema document</a>.

     </p>

    </div>

   </div>

  </xs:documentation>

 </xs:annotation>

 <xs:attribute name="lang">

  <xs:annotation>

   <xs:documentation>

    <div>

      <h3>lang (as an attribute name)</h3>

      <p>

       denotes an attribute whose value

       is a language code for the natural language of the content of

       any element; its value is inherited.  This name is reserved

       by virtue of its definition in the XML specification.</p>

    </div>

    <div>

     <h4>Notes</h4>

     <p>

      Attempting to install the relevant ISO 2- and 3-letter

      codes as the enumerated possible values is probably never

      going to be a realistic possibility.

     </p>

     <p>

      See BCP 47 at <a href="http://www.rfc-editor.org/rfc/bcp/bcp47.txt">

       http://www.rfc-editor.org/rfc/bcp/bcp47.txt</a>

      and the IANA language subtag registry at

      <a href="http://www.iana.org/assignments/language-subtag-registry">

       http://www.iana.org/assignments/language-subtag-registry</a>

      for further information.

     </p>

     <p>

      The union allows for the 'un-declaration' of xml:lang with

      the empty string.

     </p>

    </div>

   </xs:documentation>

  </xs:annotation>

  <xs:simpleType>

   <xs:union memberTypes="xs:language">

    <xs:simpleType>

     <xs:restriction base="xs:string">

      <xs:enumeration value=""/>

     </xs:restriction>

    </xs:simpleType>

   </xs:union>

  </xs:simpleType>

 </xs:attribute>

 <xs:attribute name="space">

  <xs:annotation>

   <xs:documentation>

    <div>

      <h3>space (as an attribute name)</h3>

      <p>

       denotes an attribute whose

       value is a keyword indicating what whitespace processing

       discipline is intended for the content of the element; its

       value is inherited.  This name is reserved by virtue of its

       definition in the XML specification.</p>

    </div>

   </xs:documentation>

  </xs:annotation>

  <xs:simpleType>

   <xs:restriction base="xs:NCName">

    <xs:enumeration value="default"/>

    <xs:enumeration value="preserve"/>

   </xs:restriction>

  </xs:simpleType>

 </xs:attribute>

 <xs:attribute name="base" type="xs:anyURI"> <xs:annotation>

   <xs:documentation>

    <div>

      <h3>base (as an attribute name)</h3>

      <p>

       denotes an attribute whose value

       provides a URI to be used as the base for interpreting any

       relative URIs in the scope of the element on which it

       appears; its value is inherited.  This name is reserved

       by virtue of its definition in the XML Base specification.</p>

     <p>

      See <a

      href="http://www.w3.org/TR/xmlbase/">http://www.w3.org/TR/xmlbase/</a>

      for information about this attribute.

     </p>

    </div>

   </xs:documentation>

  </xs:annotation>

 </xs:attribute>

 <xs:attribute name="id" type="xs:ID">

  <xs:annotation>

   <xs:documentation>

    <div>

      <h3>id (as an attribute name)</h3>

      <p>

       denotes an attribute whose value

       should be interpreted as if declared to be of type ID.

       This name is reserved by virtue of its definition in the

       xml:id specification.</p>

     <p>

      See <a

      href="http://www.w3.org/TR/xml-id/">http://www.w3.org/TR/xml-id/</a>

      for information about this attribute.

     </p>

    </div>

   </xs:documentation>

  </xs:annotation>

 </xs:attribute>

 <xs:attributeGroup name="specialAttrs">

  <xs:attribute ref="xml:base"/>

  <xs:attribute ref="xml:lang"/>

  <xs:attribute ref="xml:space"/>

  <xs:attribute ref="xml:id"/>

 </xs:attributeGroup>

 <xs:annotation>

  <xs:documentation>

   <div>

    <h3>Father (in any context at all)</h3>

    <div class="bodytext">

     <p>

      denotes Jon Bosak, the chair of

      the original XML Working Group.  This name is reserved by

      the following decision of the W3C XML Plenary and

      XML Coordination groups:

     </p>

     <blockquote>

       <p>

	In appreciation for his vision, leadership and

	dedication the W3C XML Plenary on this 10th day of

	February, 2000, reserves for Jon Bosak in perpetuity

	the XML name "xml:Father".

       </p>

     </blockquote>

    </div>

   </div>

  </xs:documentation>

 </xs:annotation>

 <xs:annotation>

  <xs:documentation>

   <div xml:id="usage" id="usage">

    <h2><a name="usage">About this schema document</a></h2>

    <div class="bodytext">

     <p>

      This schema defines attributes and an attribute group suitable

      for use by schemas wishing to allow <code>xml:base</code>,

      <code>xml:lang</code>, <code>xml:space</code> or

      <code>xml:id</code> attributes on elements they define.

     </p>

     <p>

      To enable this, such a schema must import this schema for

      the XML namespace, e.g. as follows:

     </p>

     <pre>

          <schema . . .>

           . . .

           <import namespace="http://www.w3.org/XML/1998/namespace"

                      schemaLocation="http://www.w3.org/2001/xml.xsd"/>

     </pre>

     <p>

      or

     </p>

     <pre>

           <import namespace="http://www.w3.org/XML/1998/namespace"

                      schemaLocation="http://www.w3.org/2009/01/xml.xsd"/>

     </pre>

     <p>

      Subsequently, qualified reference to any of the attributes or the

      group defined below will have the desired effect, e.g.

     </p>

     <pre>

          <type . . .>

           . . .

           <attributeGroup ref="xml:specialAttrs"/>

     </pre>

     <p>

      will define a type which will schema-validate an instance element

      with any of those attributes.

     </p>

    </div>

   </div>

  </xs:documentation>

 </xs:annotation>

 <xs:annotation>

  <xs:documentation>

   <div id="nsversioning" xml:id="nsversioning">

    <h2><a name="nsversioning">Versioning policy for this schema document</a></h2>

    <div class="bodytext">

     <p>

      In keeping with the XML Schema WG's standard versioning

      policy, this schema document will persist at

      <a href="http://www.w3.org/2009/01/xml.xsd">

       http://www.w3.org/2009/01/xml.xsd</a>.

     </p>

     <p>

      At the date of issue it can also be found at

      <a href="http://www.w3.org/2001/xml.xsd">

       http://www.w3.org/2001/xml.xsd</a>.

     </p>

     <p>

      The schema document at that URI may however change in the future,

      in order to remain compatible with the latest version of XML

      Schema itself, or with the XML namespace itself.  In other words,

      if the XML Schema or XML namespaces change, the version of this

      document at <a href="http://www.w3.org/2001/xml.xsd">

       http://www.w3.org/2001/xml.xsd

      </a>

      will change accordingly; the version at

      <a href="http://www.w3.org/2009/01/xml.xsd">

       http://www.w3.org/2009/01/xml.xsd

      </a>

      will not change.

     </p>

     <p>

      Previous dated (and unchanging) versions of this schema

      document are at:

     </p>

     <ul>

      <li><a href="http://www.w3.org/2009/01/xml.xsd">

	http://www.w3.org/2009/01/xml.xsd</a></li>

      <li><a href="http://www.w3.org/2007/08/xml.xsd">

	http://www.w3.org/2007/08/xml.xsd</a></li>

      <li><a href="http://www.w3.org/2004/10/xml.xsd">

	http://www.w3.org/2004/10/xml.xsd</a></li>

      <li><a href="http://www.w3.org/2001/03/xml.xsd">

	http://www.w3.org/2001/03/xml.xsd</a></li>

     </ul>

    </div>

   </div>

  </xs:documentation>

 </xs:annotation>

</xs:schema>