Help Needed to create an XSD

Hi,

I am creating a webservice that will use the output from a 3rd party. The
output of the 3rd party is an XML file with its own namespace:

Eg:

<rptTransmit xmlns="http://www.foo.ca/XMLSchemas "
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.foo.ca/XMLSchemas
http://www.foo.ca/XMLSchemas/UAT/Transmit.xsd">
:
</rptTransmit>



Now I need to create my own XSD that contains some info in addition to the
XML file I get from the 3rd party. It should look something like this

<myrpt>
<id>0000</id>
<status>pending</status>

<rptTransmit xmlns="http://www.foo.ca/XMLSchemas "
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.foo.ca/XMLSchemas
http://www.foo.ca/XMLSchemas/UAT/Transmit.xsd">
:
</rptTransmit>
</myrpt>



How will I create the XSD schema with the namespace of my tags and taking
into consideration of the 3rd party namespace? Can anyone give me a sample
XSD that will match what I 'd like to achieve

Thanks,
Cyril