Hey everyone!
As far as I know, however, there's no standard definition of "normal" wiki to use when doing analysis.
So I've started
meta:Research:Wiki with draft definitions of "public wikis" and "content wikis", along with some initial documentation about wiki metadata (names, project groups, etc.) which I plan to continue to work on.
I encourage you to edit or comment on the talk page!
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product analyst, Wikimedia Foundation