When you use a load or put operation on a base object for which you track data change events, specify period start and end dates for each source record. A base object record can have contributors from multiple source systems or primary key sources or both. To compute the overall effective period of the base object record, the

MDM Hub

aggregates the effective periods of records from all the source systems.

The following image shows a base object that has contributors from two source systems, System 1 with PKey 1 and System 2 with PKey 2:

In the preceding image, System 1 has values 1 and 2 and System 2 has values 4 and 5 for different effective periods that overlap. To compute the overall effective period of the record, the

MDM Hub

aggregates the effective periods of records from both the source systems. The result of aggregating the effective periods of records is the Best Version of Truth (BVT) for each resultant effective period. The overall effective values 1, 1/4, 2/4, 2/5, and 5 that are represented in the image are the BVT for the specific effective periods.