Restful services descriptor WADL or other way to identify method type?

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REST

Hi,

How can I identify a web service supports rest behavior or not? I have only URL of the service which i get from user at run time. And if a service supports Rest then would that service expose any descriptor(e.g WADL) through which I can get method name, method parameters and method type (e.g. Get, put, post...)?

WSDL 2.0 supports Rest but currently no web service supporting it.

Thanks,
Asif