Pls help with bpel transformation

[Bob Green]

I create a bpel using Netbean 6.0 beta 1; this bpel calls a webservice that returns a Document object to the bpel process. The Document object returned has two fields, documentId, documentName. Output from bpel looks like this:

<metadata>
<item name=documentId>1</item>
<item name=documentName>Example</item>
</metadata>

Does anyone know how to implement this? I know I probably need do some XSLT Transformation but I don't know how to do it.

Thanks in advance.