Typed XML over HTTP has many benefits:
Simplicity is key:
There are many opportunities for contributions;
I personally would like to see tools for languages different than Java,
and using annotations to further simplify the
Map to Java.
You could also help start cataloging more servicers available in the web;
you do not even need to use XSD, WADL supports also Relax NG.
And, if your site is a Web Services producer, I would encourage you to include a WADL
description of your service.
Some people use the term
to mean any typed XML over HTTP;
the two are related but REST also implies some other architectural contraints,
although WADL be very useful in implementing RESTful services.
For more info, check older
title="WADL Articles at TheAquarium">WADL articles,
as well as