A call to arms.
From 2002: “On this latter specification, Sutor is emphatic: web services are defined by whether they are described in WSDL.”
Dare weighs in on the usefulness of description languages in REST-based design and seems to conclude that Uniform Interface != Description Language and that simple discovery ( style) is the appropriate comparison.
Steve Vinoski compares IDL as used w/ CORBA/DCOM with WSDL as used by WS-*. It’s interesting that IDL served as more than just a description for machines. Humans used IDL as spec text and built services accordingly, just like REST :)