Is WADL the standard for REST applications?

Is WADL a real standard like WSDL? Should the WADL URI end with the extension ".wadl"?

I created a HelloWorld example in Jersey and I have WADL from the URL. Then I created a client using the "wadl-client-plugin" and it works.

My question is this: if I use a different structure (ie CXF) that generates WADL, can I use it in my "wadl-client-plugin" to create a client?