Reading XML data using ABAP Mapping

Dear Friends,

I have a issue with reading the below XML DATA in my ABAP Mapping program.Please share your experience .

MY XML FILE-->

<?xml version="1.0" encoding="utf-8" ?>

</CODE>

</PRODUCT>

</SELLING_CODE>

</TRANSACTION>

</FILE>

I want to read the changeID, BatchNo Value from FILE NODE and similarly from Transaction, Selling_code,Product as well.I can successfully read the other value but dont know how to read the above tag values.

I am using the interface IF_IXML_NODE to read child node values but dont know which method I ll use to read header tag values.

Thanks a lot for your kind help and support in advance.

Regards

Jay