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Annotations
Attributes
Diagrams
Facets
Properties
Source
Used by
Imported schema xml.xsd
Namespace http://www.w3.org/XML/1998/namespace
Annotations

About the XML namespace

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.

Father (in any context at all)

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".

About this schema document

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.

Versioning policy for this schema document

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:

Properties
attribute form default: unqualified
element form default: unqualified
Attribute @xml:lang
Namespace http://www.w3.org/XML/1998/namespace
Annotations

lang (as an attribute name)

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.

Notes

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.

Type union of(xs:language, restriction of xs:string)
Properties
content: simple
Used by
Source
<xs:attribute name="lang">
  <xs:annotation>
    <xs:documentation>
      <div>
        <h3>lang (as an attribute name)</h3>
        <p>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.</p>
      </div>
      <div>
        <h4>Notes</h4>
        <p>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.</p>
        <p>See BCP 47 at
          <a href="http://www.rfc-editor.org/rfc/bcp/bcp47.txt">http://www.rfc-editor.org/rfc/bcp/bcp47.txt</a>and the IANA language subtag registry at
          <a href="http://www.iana.org/assignments/language-subtag-registry">http://www.iana.org/assignments/language-subtag-registry</a>for further information.</p>
        <p>The union allows for the 'un-declaration' of xml:lang with
      the empty string.</p>
      </div>
    </xs:documentation>
  </xs:annotation>
  <xs:simpleType>
    <xs:union memberTypes="xs:language">
      <xs:simpleType>
        <xs:restriction base="xs:string">
          <xs:enumeration value=""/>
        </xs:restriction>
      </xs:simpleType>
    </xs:union>
  </xs:simpleType>
</xs:attribute>
Attribute @xml:space
Namespace http://www.w3.org/XML/1998/namespace
Annotations

space (as an attribute name)

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.

Type restriction of xs:NCName
Properties
content: simple
Facets
enumeration default
enumeration preserve
Used by
Attribute Group xml:specialAttrs
Source
<xs:attribute name="space">
  <xs:annotation>
    <xs:documentation>
      <div>
        <h3>space (as an attribute name)</h3>
        <p>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.</p>
      </div>
    </xs:documentation>
  </xs:annotation>
  <xs:simpleType>
    <xs:restriction base="xs:NCName">
      <xs:enumeration value="default"/>
      <xs:enumeration value="preserve"/>
    </xs:restriction>
  </xs:simpleType>
</xs:attribute>
Attribute @xml:base
Namespace http://www.w3.org/XML/1998/namespace
Annotations

base (as an attribute name)

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.

Type xs:anyURI
Properties
content: simple
Used by
Attribute Group xml:specialAttrs
Source
<xs:attribute name="base" type="xs:anyURI">
  <xs:annotation>
    <xs:documentation>
      <div>
        <h3>base (as an attribute name)</h3>
        <p>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.</p>
        <p>See
          <a href="http://www.w3.org/TR/xmlbase/">http://www.w3.org/TR/xmlbase/</a>for information about this attribute.</p>
      </div>
    </xs:documentation>
  </xs:annotation>
</xs:attribute>
Attribute @xml:id
Namespace http://www.w3.org/XML/1998/namespace
Annotations

id (as an attribute name)

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.

Type xs:ID
Properties
content: simple
Used by
Attribute Group xml:specialAttrs
Source
<xs:attribute name="id" type="xs:ID">
  <xs:annotation>
    <xs:documentation>
      <div>
        <h3>id (as an attribute name)</h3>
        <p>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.</p>
        <p>See
          <a href="http://www.w3.org/TR/xml-id/">http://www.w3.org/TR/xml-id/</a>for information about this attribute.</p>
      </div>
    </xs:documentation>
  </xs:annotation>
</xs:attribute>
Attribute Group xml:specialAttrs
Namespace http://www.w3.org/XML/1998/namespace
Diagram
Diagram index49.tmp#id1701 index49.tmp#id1686 index49.tmp#id1700 index49.tmp#id1702
Attributes
QName Type Fixed Default Use Annotation
xml:base xs:anyURI optional

base (as an attribute name)

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.

xml:id xs:ID optional

id (as an attribute name)

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.

xml:lang union of(xs:language, restriction of xs:string) optional

lang (as an attribute name)

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.

Notes

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.

xml:space restriction of xs:NCName optional

space (as an attribute name)

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.

Source
<xs:attributeGroup name="specialAttrs">
  <xs:attribute ref="xml:base"/>
  <xs:attribute ref="xml:lang"/>
  <xs:attribute ref="xml:space"/>
  <xs:attribute ref="xml:id"/>
</xs:attributeGroup>