To positively identify objects every ITP/MDK Repository has its own internal identification number. This allows ITP/MDK Repositories to keep track of objects' origins.
When importing, objects are identified by their name. If you for example import a project named "My Project" in an ITP/MDK Repository already containing a project "My Project", the latter will be overwritten by the imported version. The settings on the project (or other objects) will be replaced and objects contained in the imported project will be added to the existing project. If objects with the same name already exist there, they will be replaced.
Revisions are objects that are identified by their revision number, including the revision number postfix, and their timestamp. Therefore, new revisions can be traced during the import and will be added to their respective objects in the target ITP/MDK Repository.