It doesn't have to be a 1:1 mapping; there are certainly valid scenarios where it might not make sense (or it might be prohibitively difficult) to provide a par

It doesn't have to be a 1:1 mapping; there are certainly valid scenarios where it might not make sense (or it might be prohibitively difficult) to provide a particular representation of a particular resource, but that doesn't mean you shouldn't use consistent URLs where possible. This is what HTTP 406[1] is for. 1. http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html#sec10.4.7 http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html#sec10...