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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 <schema . . .>
56 . . .
57 <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 <type . . .>
64 . . .
65 <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>