Hi, I'd like to introduce XData to those who are not satisfied with XML/XML Schema :)
The world needs to exchange data. Data needs to have a specification. Schema is the specification of the data. We the programmers need to program everything. XData is a programming-friendly solution for schematized data. This is the reason XData comes to birth.
XData is an open source project, its website is https://github.com/knat/XData.