DSO for 0PS_C021

Hi,

I am planning to use DSO for the below Data Sources for the Dates cube 0PS_C021.

0PS_DAT_PRJ

0PS_DAT_MLS

ZPS_DAT_WBS

So the data from the above sources will be loaded to DSO first and then to cube 0PS_C021.

I modelling the DSO what Key FIelds ca I use?

Based on the data sources I can use Project and WBS as the key fields.

But the Data Source 0PS_DAT_PRJ doesn't contain WBS.

Please confirm if this is ok to use Project and WBS . Letme know if there will be any issues wih this design in future..

Thanks in advance.

Siva.