"Sematic Group" in BPC data loading?

Hi All:

Now, I have a Data Manager Package to load data from BW to BPC, during the loading, I wrote a UJD routine to do the calculation of expense from cost center. The issue is the data volume for one individual cost center is huge. So, those records could come in multiple packages. I would like to know if there is similar mechanism in BPC like the "Sematic Group" in BW. So, I can put all records for one cost center into one package.

Thanks,

Sean