newbie questions

[Hilaire Fernandes]

I have a few newbie questions related to Magma, probably most of these 
questions are related to OODB. May be it could be useful to collect such 
questions.

In the end user application, is it fine to keep open a session to Magma?

After closing a Magma session, what become a local object of the 
persisted object?

If one re-open a session can the remote object be 'automatically' 
updated from the local object in case it changed?

With an open session, is it fine to read a persisted object outside of a 
commit:?

Is commit: only to be used when you want to persist an object?

Hilaire