Schema validation with xinclude

["Stottlemyer, Carl" <ca...@lmco.com>]

I am getting errors when I try to validate a document that uses XInclude
against a schema.  The version of xerces being used is: 2.6.2.

The problem I am having is with the xml:base attribute.  The XInclude
FAQ says that to solve this problem one must modify the schema elements
to allow the xml:base attribute.  Unfortunately, I have been unable to
figure out how to modify my schema to allow the attribute.

Currently, I have three documents: contacts.xml, name.xml and
contacts.xsd.  When I parse contacts.xml I get the following error
message: 
[Error] contacts.xsd:25:49: src-resolve: Cannot resolve the name
'xml:base' to a(n) 'attribute declaration' component.
[Error] contacts.xsd:25:49: s4s-elt-invalid-content.1: The content of
'nameType' is invalid.  Element 'attribute' is invalid, misplaced, or
occurs too often.
[Error] name.xml:2:6: Document is invalid: no grammar found.
[Error] name.xml:2:6: Document root element "name", must match DOCTYPE
root "null".

contacts.xml
-----------------------------------------------------------------
<?xml version="1.0" encoding="UTF-8"?>
<contact xmlns="http://test" 
	xmlns:xi="http://www.w3.org/2003/XInclude" 
	xmlns:xsd="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:xml="http://www.w3.org/XML/1998/namespace" 
	xsd:schemaLocation="http://test
				  contacts.xsd">

	<xi:include href="name.xml"/>
</contact>

name.xml
--------------------------------------------------------------
<?xml version="1.0" encoding="UTF-8"?>
<name
	xmlns="http://test">
  <first>Carl</first>
  <last>Stottlemyer</last>
</name>

contacts.xsd 
------------------------------------------------------------------------
-------------------------
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
	xmlns:xml="http://www.w3.org/XML/1998/namespace" 
	xmlns:test="http://test" 
	targetNamespace="http://test" 
	elementFormDefault="qualified" 
	attributeFormDefault="unqualified">
	
<!--
	(I also downloaded the xml.xsd from w3 and tried this)
	<xsd:import namespace="http://www.w3.org/XML/1998/namespace" 
		schemaLocation="xml.xsd"/>
-->		
	<xsd:import namespace="http://www.w3.org/XML/1998/namespace"/>
	
	<xsd:element name="contact">
		<xsd:complexType>
			<xsd:sequence>
				<xsd:element name="name"
type="test:nameType" 
					maxOccurs="unbounded"/>
			</xsd:sequence>
		</xsd:complexType>
	</xsd:element>
	
	<xsd:complexType name="nameType">
		<xsd:sequence>
			<xsd:element name="first"/>
			<xsd:element name="last"/>
		</xsd:sequence>
		<xsd:attribute ref="xml:base" use="optional"/>
	</xsd:complexType>
</xsd:schema>

Carl Stottlemyer