How to convert XML document to xml variable?

Hi,

I have taken an xml variable in my process and reading a xml document file. Can anyone tell me how can i convert this xml document to xml variable so that i can parse the xml variable.

I am able to convert xml variable to xml document variable by using set value activity. But how do I perform reverse process.

I want to perform this conversion because i want to keep xml data in document format on storage drive and then parse this xml data so that i can read the nodes.

Any help will be appreciated..

Regards

Sunil