[Zope3-dev] set of interfaces?

[Jean-Marc Orliaguet]

Hi!
what is the best way in zope3 to create a collection of interfaces 
without using classes, lists, etc.?

I have a number of interfaces that I'd like to group into a same 
interface category.

e.g. ISomeCollection  = I1, I2, I3, I4 ....

and I'd like to be able to query which interfaces ISomeCollection 
"contains". However I'd like not to instanciate a registry just to hold 
that type of information.

regards
/JM