[Zope] Pluggable brains

[gotcha@swing.be]

Is there a place where pluggable brains mechanism is described ?

I am beginning a Zope site project. With the few I have read 
about pluggable brains, I feel that more info could help me in 
deciding which part of data has to stay in ZODB and which should 
go inside RDBM.

Thanks.


Godefroid Chapelle

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