Siebel -Import Repository & DDL Sync

Hi friends, Today i have a good understanding about imprep & DDl sync. imprep import the Repository schema but not create any table , i mean not applied on underline database.The moment we do DDL sync it applies on underline database.But it is also possibility that there is already existing Siebel repository named "Siebel Repository " in DB.So have new name while imprep like "Siebel Repository_date " and imprep . Have same name while do DDL Sync.
After compliting this you can rename old one & rename new one as "Siebel Repository" using Siebel tool.Compile through Tool and put SRF at appropriate location. :-)