If you use the site's search box (top right corner) for 'Serialize XML', you'll get quiet a few results. The second result leads to an example.
Serialize XML serializes a Tersus data structure into XML.
If your content is in HTML you'll need to parse it into a data structure by searching for the relevant info and manipulating it most probably requiring you to use the various templates in the Text category of the palette.
For best results, use the Firefox browser..