Source records are different from the SBR in that each source record contains a system and local ID pair and only contains data from a specific system. The information in the source records of an object profile is used to determine the best values for the SBR in that profile. If an object profile only contains one source record, the SBR will be identical to that source record. However, if an object profile contains multiple source records, the SBR might be identical to one source record but will more likely include a combination of information from all source records. Certain actions against a source record will cause the SBR to be changed, such as updating, deactivating, or merging a source record. Each active object profile must have at least one active source record. If all source records in a profile are deactivated, then the entire profile will also be deactivated.