Mini (Inline) Onebox Support RFC

Replacing my <a href="url-goes-here">description about url</a> description about a url will break my in-line use of html links. The og:title (or whatever) is unlikely to fit in the sentence the same way. Am I misunderstanding this? Is it a proposal for adding a footer with that information? I look at that Wikipedia thing and think that it is just about the decoration around the links. That I’d have no issue with.