Fragment of a discussion from WikiEducator talk:Style guide/Proposed guidelines
Workgroup isn't actually a namespace. The "Workgroup:" bit is actually part if the title, which is why the talk page is actually at "Talk:Workgroup". This is a situation I've worked with before, and we called it a "pseudo" namespace. I'm not sure why WE has done things, but in regards to subpages, they work because the pages are actually in the main namespace, which does have them enabled.
Jesse Groppi (talk)
Interesting. I did not notice that. Maybe it makes it easier for somethings. Subpages are now enabled for the Wikieducator namespace.