Board Thread:Questions and Answers/@comment-24172144-20140818232341/@comment-3361105-20140821222612

I think I mentioned this on a talk-page somewhere, but this website (the DC Database) establishes the language with which the fandom discusses the comics in many cases.

While we try to use first-hand sources where possible, some of our Earth-designations originated here out of necessity, and they have not always reflected what DC does because they can't. DC is inconsistent. DC forgets its own conventions. DC changes its mind.

As such, we stick with what we use, for as long as it works.

The "Prime Earth" naming convention will likely remain, with the tacit understanding that it is what Multiversity calls "Earth-0", and the further (also tacit) understanding that as far as we are concerned, the New 52 uses no hyphen, and Prime Earth is therefore the same thing as "Earth 0."