1 | <?xml version='1.0'?>
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2 | <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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3 |
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4 | <xs:annotation>
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5 | <xs:documentation>
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6 | See http://www.w3.org/XML/1998/namespace.html and
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7 | http://www.w3.org/TR/REC-xml for information about this namespace.
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8 |
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9 | This schema document describes the XML namespace, in a form
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10 | suitable for import by other schema documents.
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11 |
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12 | Note that local names in this namespace are intended to be defined
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13 | only by the World Wide Web Consortium or its subgroups. The
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14 | following names are currently defined in this namespace and should
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15 | not be used with conflicting semantics by any Working Group,
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16 | specification, or document instance:
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17 |
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18 | base (as an attribute name): denotes an attribute whose value
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19 | provides a URI to be used as the base for interpreting any
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20 | relative URIs in the scope of the element on which it
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21 | appears; its value is inherited. This name is reserved
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22 | by virtue of its definition in the XML Base specification.
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23 |
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24 | id (as an attribute name): denotes an attribute whose value
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25 | should be interpreted as if declared to be of type ID.
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26 | This name is reserved by virtue of its definition in the
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27 | xml:id specification.
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28 |
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29 | lang (as an attribute name): denotes an attribute whose value
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30 | is a language code for the natural language of the content of
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31 | any element; its value is inherited. This name is reserved
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32 | by virtue of its definition in the XML specification.
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33 |
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34 | space (as an attribute name): denotes an attribute whose
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35 | value is a keyword indicating what whitespace processing
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36 | discipline is intended for the content of the element; its
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37 | value is inherited. This name is reserved by virtue of its
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38 | definition in the XML specification.
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39 |
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40 | Father (in any context at all): denotes Jon Bosak, the chair of
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41 | the original XML Working Group. This name is reserved by
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42 | the following decision of the W3C XML Plenary and
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43 | XML Coordination groups:
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44 |
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45 | In appreciation for his vision, leadership and dedication
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46 | the W3C XML Plenary on this 10th day of February, 2000
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47 | reserves for Jon Bosak in perpetuity the XML name
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48 | xml:Father
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49 | </xs:documentation>
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50 | </xs:annotation>
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51 |
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52 | <xs:annotation>
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53 | <xs:documentation>This schema defines attributes and an attribute group
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54 | suitable for use by
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55 | schemas wishing to allow xml:base, xml:lang, xml:space or xml:id
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56 | attributes on elements they define.
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57 |
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58 | To enable this, such a schema must import this schema
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59 | for the XML namespace, e.g. as follows:
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60 | <schema . . .>
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61 | . . .
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62 | <import namespace="http://www.w3.org/XML/1998/namespace"
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63 | schemaLocation="http://www.w3.org/2001/xml.xsd"/>
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64 |
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65 | Subsequently, qualified reference to any of the attributes
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66 | or the group defined below will have the desired effect, e.g.
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67 |
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68 | <type . . .>
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69 | . . .
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70 | <attributeGroup ref="xml:specialAttrs"/>
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71 |
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72 | will define a type which will schema-validate an instance
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73 | element with any of those attributes</xs:documentation>
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74 | </xs:annotation>
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75 |
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76 | <xs:annotation>
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77 | <xs:documentation>In keeping with the XML Schema WG's standard versioning
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78 | policy, this schema document will persist at
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79 | http://www.w3.org/2007/08/xml.xsd.
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80 | At the date of issue it can also be found at
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81 | http://www.w3.org/2001/xml.xsd.
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82 | The schema document at that URI may however change in the future,
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83 | in order to remain compatible with the latest version of XML Schema
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84 | itself, or with the XML namespace itself. In other words, if the XML
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85 | Schema or XML namespaces change, the version of this document at
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86 | http://www.w3.org/2001/xml.xsd will change
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87 | accordingly; the version at
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88 | http://www.w3.org/2007/08/xml.xsd will not change.
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89 | </xs:documentation>
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90 | </xs:annotation>
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91 |
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92 | <xs:attribute name="lang">
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93 | <xs:annotation>
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94 | <xs:documentation>Attempting to install the relevant ISO 2- and 3-letter
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95 | codes as the enumerated possible values is probably never
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96 | going to be a realistic possibility. See
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97 | RFC 3066 at http://www.ietf.org/rfc/rfc3066.txt and the IANA registry
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98 | at http://www.iana.org/assignments/lang-tag-apps.htm for
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99 | further information.
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100 |
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101 | The union allows for the 'un-declaration' of xml:lang with
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102 | the empty string.</xs:documentation>
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103 | </xs:annotation>
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104 | <xs:simpleType>
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105 | <xs:union memberTypes="xs:language">
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106 | <xs:simpleType>
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107 | <xs:restriction base="xs:string">
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108 | <xs:enumeration value=""/>
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109 | </xs:restriction>
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110 | </xs:simpleType>
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111 | </xs:union>
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112 | </xs:simpleType>
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113 | </xs:attribute>
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114 |
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115 | <xs:attribute name="space">
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116 | <xs:simpleType>
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117 | <xs:restriction base="xs:NCName">
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118 | <xs:enumeration value="default"/>
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119 | <xs:enumeration value="preserve"/>
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120 | </xs:restriction>
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121 | </xs:simpleType>
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122 | </xs:attribute>
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123 |
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124 | <xs:attribute name="base" type="xs:anyURI">
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125 | <xs:annotation>
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126 | <xs:documentation>See http://www.w3.org/TR/xmlbase/ for
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127 | information about this attribute.</xs:documentation>
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128 | </xs:annotation>
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129 | </xs:attribute>
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130 |
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131 | <xs:attribute name="id" type="xs:ID">
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132 | <xs:annotation>
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133 | <xs:documentation>See http://www.w3.org/TR/xml-id/ for
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134 | information about this attribute.</xs:documentation>
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135 | </xs:annotation>
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136 | </xs:attribute>
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137 |
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138 | <xs:attributeGroup name="specialAttrs">
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139 | <xs:attribute ref="xml:base"/>
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140 | <xs:attribute ref="xml:lang"/>
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141 | <xs:attribute ref="xml:space"/>
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142 | <xs:attribute ref="xml:id"/>
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143 | </xs:attributeGroup>
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144 |
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145 | </xs:schema>
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