The ideas is that the URL references the resource and the content type requested is only asking for that content in a different projection or representation.
The content at a URL should always match, the format in which its represented can be different based on the request. Its a bit like buying a book in hard copy or paperback, same book different format.
The content at a URL should always match, the format in which its represented can be different based on the request. Its a bit like buying a book in hard copy or paperback, same book different format.