WSDL is an object notation for objects that describe what a web service should do. This could just as well be done in JSON. It would be marginally less verbose,

WSDL is an object notation for objects that describe what a web service should do. This could just as well be done in JSON. It would be marginally less verbose, too :-) Oh, and it's perfectly feasible to translate a well formed HTML document into some sort of JSON object. After all, HTML is just a set of tags with values, no?