Thanks for your answer, ribz33.
Let me explain better what i need to implement.
We have a lot of "collaboration" documents "structured" by fields ( text type ) that need to be editing by more users.
So the "document life" would be :
1.The first one user fills his field and after update the document goes to the second user.
2.The second user, read, and only read, what the first user wrote, and after done his job, fills his fields and the document goes to the third user.
3…
4.When the document has completely filled a transformation in pdf, doc, and goes to the final repository.
Obviously would be nice to read the document and have the permission to modify only the proper fields with direct edit
I'm trying to find this solution, but i don't ask how could be implemented : just, if there is and i think there is, to suggest a way.
Many Thanks.