It depends on what you are focussing on. Do you plan to write more
related, XPlanet modules, or would you like to see more XPlanet modules?
Then you should use something in the XPlanet:: hierarchy.
in reply to Module Naming Suggestions needed
Or is the API the most important, and it just happens to be that it's
implemented wtih XPlanet? That is, you want to write (or see others
write) more modules with the same API with a different underlaying
machinery? Then something like Foo::Bar::Xplanet works
well, for suitable Foo::Bar