[Commentor] LC-335 Ian Jacobs [Comment] * Please delete "Where possible" * I suggest merging these two into a single point about following standard protocols for content type negotiation. [Commentor reply] yes [Working Group decision] 
The point is that: * simple standard content negotiation works poorly in the mobile space. * It may not be possible to do it if you're not using content adaptation. * Respect the markup format the client is asking for.