How to use XML helper

[eluser]condoace[/eluser]
I am using XML helper.

I have a string I pass to xml_convert('string').

I get back a full RSS/XML feed with entities.

What I want to do is grab one of these, for example <item> and store just the text in my db.. how can I do this? any libraries or ideas?

There is little info on the XML helper.. hence why I think this might help others aswell.. thanks