[Zope] questions on XML and XSL

Hello, Is someone successfully using .XSL to format a XML documents? If yes the document probably look nice, but how does it looks during editing?? Is there some demo online where it is possible to edit a XML document, modify/add/delete nodes? (I used the sax python library to do it, but without XSL/CSS the document looks ugly) The only library I found for XSL and python is 'xslpattern', has anybody used it? Thanks for any hint. Gilles lavaux