UAProf + audio

Hello Folks,

I'd like to personalize the contents that I send to the users using
XML files.
I m wondering a lot of things about this :



1.Is rdf and UAProf the same thing???
2. With old models, the UAProf is not provided in the Header. Do it exist in other place so that i can download it and put it in local.
2.is it better to download all XML files and put it in local, rather than read them from the URL in the Header?
3. I must manage the number of chords of the polifonics.
Right now, I manage a database which make the relation with the UserAgent (in the Header), and the characteristics of the model (Very long and not sure according to me)

I didn t see in the XML files nothing with the number of chords of polifonics... Is the only way to do it is to make my own database, or is there a way to do it automatically??
4.I m wondering the same question for all the type of file which have various formats ( to adapt it better for the client )...

Well, Forgive me for so much questions, and for my bad english, but I m kind of lost in that, and I spent too much time making a database that is not so good
Thanks for your attention
Julien