1 files changed, 80 insertions, 0 deletions
diff --git a/schema/xml.xsd b/schema/xml.xsd
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+++ b/schema/xml.xsd
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+<?xml version='1.0'?>
+<xs:schema targetNamespace="http://www.w3.org/XML/1998/namespace" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en">
+
+ <xs:annotation>
+  <xs:documentation>
+   See http://www.w3.org/XML/1998/namespace.html and
+   http://www.w3.org/TR/REC-xml for information about this namespace.
+  </xs:documentation>
+ </xs:annotation>
+
+ <xs:annotation>
+  <xs:documentation>This schema defines attributes and an attribute group
+        suitable for use by
+        schemas wishing to allow xml:base, xml:lang or xml:space attributes
+        on elements they define.
+
+        To enable this, such a schema must import this schema
+        for the XML namespace, e.g. as follows:
+        &lt;schema . . .>
+         . . .
+         &lt;import namespace="http://www.w3.org/XML/1998/namespace"
+                    schemaLocation="http://www.w3.org/2001/03/xml.xsd"/>
+
+        Subsequently, qualified reference to any of the attributes
+        or the group defined below will have the desired effect, e.g.
+
+        &lt;type . . .>
+         . . .
+         &lt;attributeGroup ref="xml:specialAttrs"/>
+ 
+         will define a type which will schema-validate an instance
+         element with any of those attributes</xs:documentation>
+ </xs:annotation>
+
+ <xs:annotation>
+  <xs:documentation>In keeping with the XML Schema WG's standard versioning
+   policy, this schema document will persist at
+   http://www.w3.org/2001/03/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.  In other words, if the XML Schema namespace changes, the version
+   of this document at
+   http://www.w3.org/2001/xml.xsd will change
+   accordingly; the version at
+   http://www.w3.org/2001/03/xml.xsd will not change.
+  </xs:documentation>
+ </xs:annotation>
+
+ <xs:attribute name="lang" type="xs:language">
+  <xs:annotation>
+   <xs:documentation>In due course, we should install the relevant ISO 2- and 3-letter
+         codes as the enumerated possible values . . .</xs:documentation>
+  </xs:annotation>
+ </xs:attribute>
+
+ <xs:attribute name="space" default="preserve">
+  <xs:simpleType>
+   <xs:restriction base="xs:NCName">
+    <xs:enumeration value="default"/>
+    <xs:enumeration value="preserve"/>
+   </xs:restriction>
+  </xs:simpleType>
+ </xs:attribute>
+
+ <xs:attribute name="base" type="xs:anyURI">
+  <xs:annotation>
+   <xs:documentation>See http://www.w3.org/TR/xmlbase/ for
+                     information about this attribute.</xs:documentation>
+  </xs:annotation>
+ </xs:attribute>
+
+ <xs:attributeGroup name="specialAttrs">
+  <xs:attribute ref="xml:base"/>
+  <xs:attribute ref="xml:lang"/>
+  <xs:attribute ref="xml:space"/>
+ </xs:attributeGroup>
+
+</xs:schema>