This schema document describes the XML namespace, in a form + suitable for import by other schema documents.
++ See + http://www.w3.org/XML/1998/namespace.html + and + http://www.w3.org/TR/REC-xml + for information + about this namespace. +
+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.
++ See further below in this document for more information about + how to refer to this schema document from your own + XSD schema documents + and about + the + namespace-versioning policy governing this schema document + . +
+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.
+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.
++ See BCP 47 at + http://www.rfc-editor.org/rfc/bcp/bcp47.txt + and the IANA language subtag registry at + http://www.iana.org/assignments/language-subtag-registry + for further information. +
+The union allows for the 'un-declaration' of xml:lang with + the empty string.
+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.
+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.
++ See + http://www.w3.org/TR/xmlbase/ + for information about this attribute. +
+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.
++ See + http://www.w3.org/TR/xml-id/ + for information about this attribute. +
+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:
+++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".
+
+ This schema defines attributes and an attribute group suitable
+ for use by schemas wishing to allow
+ xml:base
+ ,
+ xml:lang
+ ,
+ xml:space
+ or
+ xml:id
+ attributes on elements they define.
+
To enable this, such a schema must import this schema for + the XML namespace, e.g. as follows:
+<schema . . .> + . . . + <import namespace="http://www.w3.org/XML/1998/namespace" + schemaLocation="http://www.w3.org/2001/xml.xsd"/>+
or
+<import namespace="http://www.w3.org/XML/1998/namespace" + schemaLocation="http://www.w3.org/2009/01/xml.xsd"/>+
Subsequently, qualified reference to any of the attributes or the + group defined below will have the desired effect, e.g.
+<type . . .> + . . . + <attributeGroup ref="xml:specialAttrs"/>+
will define a type which will schema-validate an instance element + with any of those attributes.
++ In keeping with the XML Schema WG's standard versioning + policy, this schema document will persist at + http://www.w3.org/2009/01/xml.xsd + . +
++ At the date of issue it can also be found at + http://www.w3.org/2001/xml.xsd + . +
++ 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 + http://www.w3.org/2001/xml.xsd + will change accordingly; the version at + http://www.w3.org/2009/01/xml.xsd + will not change. +
+Previous dated (and unchanging) versions of this schema + document are at:
+ +