Workitem attribute list???

Hello all,

I'm writing an application for iPhone, which connects it to an RTC server and makes the user able to download workitems and show them into a table view list, the application also make the use able to create new workitem and post them to the server, while creating a new workitem i should have a list of workitem properties, like: type,priority,status;

somebody of you knows where is the xml/json file, on the RTC server, containig the list of workitem properties, if exist???

thanks and ciao
mattobob