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libxml2

    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:         &lt;schema . . .>
   57:          . . .
   58:          &lt;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:         &lt;type . . .>
   65:          . . .
   66:          &lt;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>