IRC uses a very simple way of handling rooms and private messages: in addition to a From property, all events also have a To property. There is no intrinsic separation between the messages addressed at different rooms. It's a very natural way to go about it, I think.

Makeshifts last the longest.

In reply to Re^2: best data model for chat program by Aristotle
in thread best data model for chat program by dev2000

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