[Zope] Temporary Storage?

[Chris Withers]

Hi,

I'm hoping someone can shed some light on this...

What is a 'Temporary Folder'?
How does it relate to a 'Session Data Container'?
What happens if you instantiate a 'Session Data Container' in a normal folder?
Are previous revisions for objects kept in memory or on disk for information 
stores in a TF or SDC?

Can you use either of these to store a mapping where you want key/value pairs to 
expire after a certain amount of time?

If so, how would you do so?

cheers,

Chris