If I have a SQL database MYDATABASE and I import this into a new DDT project MYPROJECT I would expect it to read all the structures, indexes, PKs etc ( if I have check the right boxes on the import wizard )

Now, I make changes in DDT and I deploy to the server.  My changes are deployed.

Now the DBA makes some changes on the server.  I want to keep my metadata in DDT in sync.  If I import into the same project I get MYDATABASE_1 .  Fair enough.  I can now use that as the most current version of the metadata ( or use MYDATABASE to fix the server if the DBA has done something boneheaded. )

But I am not sure what is going on in the Strataframe database.  If I create a new DDT project - MYPROJECT2 - and import the MYDATABASE, am I going to confuse any of the data stored in Strataframe?  ie. are surrogate keys keeping all this straight?  Suppose I import MYDATABASE into MYPROJECT2 and then deploy a changed version of it to MYDATABASE2 on the same server? 

In other words, is there anything like this I have to be careful of when using DDT ?

TIA