Hello Roberto,
I only briefly looked at the site and at the spec, so I might have missed something. Do you intend for this XML to be written by hand or is this to be generated by some automated tool? If the former, please reconsider and use a simpler plain text format that can be transformed into XML. If the latter, is there some proof of concept or reference implementation?
Yes, a script generates every night a snapshot of the LGPL'd entries of the http://www.linuxcompatible.org database and packaged it. For a few example what you can do with the XML files and how you can send data back see this FAQ entry: http://www.compatdb.org/faq-96.html Thanks, Philipp