title: Difference between WSDL 2.0, WADL & XRD?
body: <ul>
  <li>WSDL 2.0: www.w3.org/TR/wsdl20/</li>
  <li>WADL www.w3.org/Submission/wadl/</li>
  <li>XRD www.oasis-open.org/committees/download.php/35274/xrd-1.0-wd10.html</li>
  </ul>
  
  <p>All three can be used a REST API descriptors. What's the differences? I know this is a heated question, but I simply want a comparison, not a flame war :P</p>