Legal package names

[Adrian Hey]

Hello,

I've been trying 6.4 on one of my libraries and it seems it doesn't
like my package names. I give my packages the same name as their
place in the module hierarchy.

e.g.
name: Data.COrdering

Is there any reason why this shouldn't be allowed? It seems
so much more convenient this may, at least for packages
the have just one root module.

Regards
--
Adrian Hey