Daniel Mayer wrote:
No separate project needed (a sub-project of Wikibooks might be needed though).
There's no such thing as a sub-project, at least not on the software level. Either it is one project, or two. Two projects could be accessing the same database, but I don't see a reason for that, as we'd have two interfaces to show and do exactly the same thing.
Two projects could be *presented* as project and subproject, though. If we call the two projects wikibooks.org and wikisources.org, or rather textbooks.wikibooks.org and sources.wikibooks.org, doesn't make a difference, at least not to me.