The World Wide Web is considered by far to be a simple and universal standard for exchanging information. This information that started to be manually composed and human readable, needed to grow more to reach dynamic composition and machine readability. Static web documents starved for a light breeze to release it from data and presentation mixture and lift it to a higher level of data representation and organization. XML "the extensible markup language'' as a standard of data representation on the web offered flexibility and simplicity in representing self describing electronic documents. This ...