1<?xml version='1.0'?>
2<xs:schema targetNamespace="http://www.w3.org/XML/1998/namespace" xmlns:xs="http://www.w3.org/2001/XMLSchema" xml:lang="en">
3 
4 <xs:annotation>
5  <xs:documentation>
6   See http://www.w3.org/XML/1998/namespace.html and
7   http://www.w3.org/TR/REC-xml for information about this namespace.
8 
9    This schema document describes the XML namespace, in a form
10    suitable for import by other schema documents.  
11 
12    Note that local names in this namespace are intended to be defined
13    only by the World Wide Web Consortium or its subgroups.  The
14    following names are currently defined in this namespace and should
15    not be used with conflicting semantics by any Working Group,
16    specification, or document instance:
17 
18    base (as an attribute name): denotes an attribute whose value
19         provides a URI to be used as the base for interpreting any
20         relative URIs in the scope of the element on which it
21         appears; its value is inherited.  This name is reserved
22         by virtue of its definition in the XML Base specification.
23 
24    lang (as an attribute name): denotes an attribute whose value
25         is a language code for the natural language of the content of
26         any element; its value is inherited.  This name is reserved
27         by virtue of its definition in the XML specification.
28  
29    space (as an attribute name): denotes an attribute whose
30         value is a keyword indicating what whitespace processing
31         discipline is intended for the content of the element; its
32         value is inherited.  This name is reserved by virtue of its
33         definition in the XML specification.
34 
35    Father (in any context at all): denotes Jon Bosak, the chair of 
36         the original XML Working Group.  This name is reserved by 
37         the following decision of the W3C XML Plenary and 
38         XML Coordination groups:
39 
40             In appreciation for his vision, leadership and dedication
41             the W3C XML Plenary on this 10th day of February, 2000
42             reserves for Jon Bosak in perpetuity the XML name
43             xml:Father
44  </xs:documentation>
45 </xs:annotation>
46 
47 <xs:annotation>
48  <xs:documentation>This schema defines attributes and an attribute group
49        suitable for use by
50        schemas wishing to allow xml:base, xml:lang or xml:space attributes
51        on elements they define.
52 
53        To enable this, such a schema must import this schema
54        for the XML namespace, e.g. as follows:
55        &lt;schema . . .>
56         . . .
57         &lt;import namespace="http://www.w3.org/XML/1998/namespace"
58                    schemaLocation="http://www.w3.org/2001/03/xml.xsd"/>
59 
60        Subsequently, qualified reference to any of the attributes
61        or the group defined below will have the desired effect, e.g.
62 
63        &lt;type . . .>
64         . . .
65         &lt;attributeGroup ref="xml:specialAttrs"/>
66 
67         will define a type which will schema-validate an instance
68         element with any of those attributes</xs:documentation>
69 </xs:annotation>
70 
71 <xs:annotation>
72  <xs:documentation>In keeping with the XML Schema WG's standard versioning
73   policy, this schema document will persist at
74   http://www.w3.org/2001/03/xml.xsd.
75   At the date of issue it can also be found at
76   http://www.w3.org/2001/xml.xsd.
77   The schema document at that URI may however change in the future,
78   in order to remain compatible with the latest version of XML Schema
79   itself.  In other words, if the XML Schema namespace changes, the version
80   of this document at
81   http://www.w3.org/2001/xml.xsd will change
82   accordingly; the version at
83   http://www.w3.org/2001/03/xml.xsd will not change.
84  </xs:documentation>
85 </xs:annotation>
86 
87 <xs:attribute name="lang" type="xs:language">
88  <xs:annotation>
89   <xs:documentation>In due course, we should install the relevant ISO 2- and 3-letter
90         codes as the enumerated possible values . . .</xs:documentation>
91  </xs:annotation>
92 </xs:attribute>
93 
94 <xs:attribute name="space" default="preserve">
95  <xs:simpleType>
96   <xs:restriction base="xs:NCName">
97    <xs:enumeration value="default"/>
98    <xs:enumeration value="preserve"/>
99   </xs:restriction>
100  </xs:simpleType>
101 </xs:attribute>
102 
103 <xs:attribute name="base" type="xs:anyURI">
104  <xs:annotation>
105   <xs:documentation>See http://www.w3.org/TR/xmlbase/ for
106                     information about this attribute.</xs:documentation>
107  </xs:annotation>
108 </xs:attribute>
109 
110 <xs:attributeGroup name="specialAttrs">
111  <xs:attribute ref="xml:base"/>
112  <xs:attribute ref="xml:lang"/>
113  <xs:attribute ref="xml:space"/>
114 </xs:attributeGroup>
115 
116</xs:schema>
117