Replication Questions

Hello all,

   i am developing a new app that and i want to use maxdb replication with it, i have any questions, i hope you can help me.

1. when i have to do any structure change (add a column with alter table for example), it is replicated? or have i to do with replication units deactivated and make the structure change in all the clients?
2. If i deactivate the units and later activate them the changes made in this time are lost? (i refer to all the changes, client and master in a IN/OUT, if i only have out i know i can "send content to client")
3. I would like to use sequence numbers in the structure (i have the possibility to use natural keys but any times with multiple columns, not too much practical), i have tried but when i create the sequence in the master it is not replicated in the client so i can not use the sequence in inserts into the client, can i use sequence numbers? what if about collision, the numbers that in my design can have a collision are meaningless because i haver other unique columns so i have no problem in automatically change them in the two databases if i have collision but i don't know if i can do it an how.
4. i have not tried yet with triggers, but without foreign keys i am planning use extensive use of triggers to save the integrity, if i use exactly the same name scheme, are they replicated? if not, if i add the triggers with the same name in all clients and the master, would they be used in propagation?

Thanks by your reply in advance and sorry for too many questions but i don't find very clear the synchronization documentation.

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