Hi,
First you create one webpage which will display records in xml format.

Ex:
Run a select statment in the webpage and build xml format.
which will have this format
<countries>
<country>
<text>India</text>
<value>01</value>
</country>
<country>
<text>China</text>
<value>02</value>
</country>
<country>
<text>USA</text>
<value>03</value>
</country>
<country>
<text>Germany</text>
<value>04</value>
</country>
</countries>

I Hope you got if anything else let me know.