where can i find the specification of hibernate ?

What specification?

And if you don't stop spamming our forum, I'll remove your account.

i've downloaded the reference documentation. It tells me how to use hibernate. But i want to know how does really work hibernate...
like :
how hibernate know for ie which column to update (coz it update the necessary one) ?
i have question like : does hivernate question the data base regularly ?
or does he depend of the business process ?

for ie :
if i have an external batch working on database, and an other application using hivernate using the same database ? does hibernate know changes made by the batch, while the application working ?

ps : sorry for my multiple subject.
sorry for my bad english too ! :)

This is all noted in the reference documentation. Your questions are not neccessarily related to the internals of Hibernate. Hibernates primary cache (in the Session) is transaction-scoped, so it will know of the changes if you are not using an additional cache.

Just continue reading the reference (and other) documentation and ask specific questions if you have specific problems.