[02:04:04] <wm-bb>	 <gtisza> If the page doesn't exist, I would expect the article ID to be 0. The namespace doesn't have a similarly clear contract - it would be perfectly sensible to have it reflect the namespace of the current title even if the title doesn't exist. (re @jhsoby: In JavaScript using mw.config, what is the best/most correct way to check that the page you're on doesn't exist?
[02:04:04] <wm-bb>	 <gtisza> 
[02:04:05] <wm-bb>	 <gtisza> wgArticleId ==...)
[02:19:01] <wm-bb>	 <Nikki> I assumed that checking the namespace was to ignore special pages (where the article id is 0 whether it exists or not)
[03:10:58] <wm-bb>	 <jhsoby> Indeed it was (re @Nikki: I assumed that checking the namespace was to ignore special pages (where the article id is 0 whether it exists or not))