xml.xsd
1 <?xml version='1.0' encoding="ISO-8859-1"?> 2 <!--!DOCTYPE xs:schema PUBLIC "-//W3C//DTD XMLSCHEMA 200102//EN" "XMLSchema.dtd" --> 3 <xs:schema targetNamespace="http://www.w3.org/XML/1998/namespace" xmlns:xs="http://www.w3.org/2001/XMLSchema" xml:lang="en"> 4 5 <xs:annotation> 6 <xs:documentation> 7 See http://www.w3.org/XML/1998/namespace.html and 8 http://www.w3.org/TR/REC-xml for information about this namespace. 9 10 This schema document describes the XML namespace, in a form 11 suitable for import by other schema documents. 12 13 Note that local names in this namespace are intended to be defined 14 only by the World Wide Web Consortium or its subgroups. The 15 following names are currently defined in this namespace and should 16 not be used with conflicting semantics by any Working Group, 17 specification, or document instance: 18 19 base (as an attribute name): denotes an attribute whose value 20 provides a URI to be used as the base for interpreting any 21 relative URIs in the scope of the element on which it 22 appears; its value is inherited. This name is reserved 23 by virtue of its definition in the XML Base specification. 24 25 lang (as an attribute name): denotes an attribute whose value 26 is a language code for the natural language of the content of 27 any element; its value is inherited. This name is reserved 28 by virtue of its definition in the XML specification. 29 30 space (as an attribute name): denotes an attribute whose 31 value is a keyword indicating what whitespace processing 32 discipline is intended for the content of the element; its 33 value is inherited. This name is reserved by virtue of its 34 definition in the XML specification. 35 36 Father (in any context at all): denotes Jon Bosak, the chair of 37 the original XML Working Group. This name is reserved by 38 the following decision of the W3C XML Plenary and 39 XML Coordination groups: 40 41 In appreciation for his vision, leadership and dedication 42 the W3C XML Plenary on this 10th day of February, 2000 43 reserves for Jon Bosak in perpetuity the XML name 44 xml:Father 45 </xs:documentation> 46 </xs:annotation> 47 48 <xs:annotation> 49 <xs:documentation>This schema defines attributes and an attribute group 50 suitable for use by 51 schemas wishing to allow xml:base, xml:lang or xml:space attributes 52 on elements they define. 53 54 To enable this, such a schema must import this schema 55 for the XML namespace, e.g. as follows: 56 <schema . . .> 57 . . . 58 <import namespace="http://www.w3.org/XML/1998/namespace" 59 schemaLocation="http://www.w3.org/2001/03/xml.xsd"/> 60 61 Subsequently, qualified reference to any of the attributes 62 or the group defined below will have the desired effect, e.g. 63 64 <type . . .> 65 . . . 66 <attributeGroup ref="xml:specialAttrs"/> 67 68 will define a type which will schema-validate an instance 69 element with any of those attributes</xs:documentation> 70 </xs:annotation> 71 72 <xs:annotation> 73 <xs:documentation>In keeping with the XML Schema WG's standard versioning 74 policy, this schema document will persist at 75 http://www.w3.org/2001/03/xml.xsd. 76 At the date of issue it can also be found at 77 http://www.w3.org/2001/xml.xsd. 78 The schema document at that URI may however change in the future, 79 in order to remain compatible with the latest version of XML Schema 80 itself. In other words, if the XML Schema namespace changes, the version 81 of this document at 82 http://www.w3.org/2001/xml.xsd will change 83 accordingly; the version at 84 http://www.w3.org/2001/03/xml.xsd will not change. 85 </xs:documentation> 86 </xs:annotation> 87 88 <xs:attribute name="lang" type="xs:language"> 89 <xs:annotation> 90 <xs:documentation>In due course, we should install the relevant ISO 2- and 3-letter 91 codes as the enumerated possible values . . .</xs:documentation> 92 </xs:annotation> 93 </xs:attribute> 94 95 <xs:attribute name="space" default="preserve"> 96 <xs:simpleType> 97 <xs:restriction base="xs:NCName"> 98 <xs:enumeration value="default"/> 99 <xs:enumeration value="preserve"/> 100 </xs:restriction> 101 </xs:simpleType> 102 </xs:attribute> 103 104 <xs:attribute name="base" type="xs:anyURI"> 105 <xs:annotation> 106 <xs:documentation>See http://www.w3.org/TR/xmlbase/ for 107 information about this attribute.</xs:documentation> 108 </xs:annotation> 109 </xs:attribute> 110 111 <xs:attributeGroup name="specialAttrs"> 112 <xs:attribute ref="xml:base"/> 113 <xs:attribute ref="xml:lang"/> 114 <xs:attribute ref="xml:space"/> 115 </xs:attributeGroup> 116 117 </xs:schema>