WADL applications?

I have read the book "Restful Web services". In that book it described WADL and it's purpose to describe REST开发者_StackOverflow社区ful web applications.

That book was written in 2007, and at that time there weren't many web applications using WADL.

I wonder if that has changed. How many web applications and which popular web applications are using WADL to describe it's RESTful API?

A wadl works very effective when you want to test your webservices using SoapUI. Just copy paste your wadl and your ready to go.

In my opinion that is very helpful.

There are alot of iPhone apps that talk to wadl based webservices. Most of the time the people that build the webservice need to explain the service to the people that build the iPhone apps. And a wadl helps in those cases

If you do REST properly you really don't need WADL. The API itself should be self-describing. The important thing to document is the media-types and link relations that you use.