[www-xml-schema-comments] <none>

Hi,
	I think we need the ability to define possible element
structures and validate XML using XSD. For example, I have the following
XML.
<?xml version="1.0" encoding="utf-8"?>
<Data xmlns="http://tempuri.org/Xml.xsd">
    <!-1 St Extraction -->
<Extraction>
        <File>
            <Name>WEI</Name>
        </File>
        <File>
            <Name>Abi</Name>
        </File>
    </Extraction>
    <!-2 nd Extraction.
I am expecting either above or below.
    I should not have Sum in Extraction and file
    -->
    <Extraction>
        <File>
            <Sum>3</Sum>
            <Name>WEI</Name>
        </File>
        <File>
            <Sum>3</Sum>
            <Name>Abi</Name>
        </File>
    </Extraction>
</Data>

I need to have either  1st or 2nd type of Extraction not both. In short
in my XML I should have sum specified at Extraction level or at File
level not both. How can I do that. Choice seem to restrict and throw an
error 'Elements with the same name and in the same scope must have the
same type. An error occurred at , (28, 10).' I have attached XML and
XSD.

 <<Xml.xml>>  <<Xml.xsd>> With Regards, 
Abi ( Abishek Bellamkonda )
.NET Architect - Multi-Tier Applications
Australia South Application Deliver Unit
e Australia Pty. Ltd. 
13/484 St. Kilda Road
Melbourne
Victoria 3004 
Australia 
Tel:	(+61-3) 8866 7243
Fax: 	(+61-3) 8866 7825 
EMail: abishek.bellamkonda-eds@eds.com