Thanks for responde Praveen Panyam.
I've been looking at the tables as you indicate me...
Of data tables mrss I'm looking its relationship with tables ps, as I need to list some data from the schedules that do not contain reporting standards of mrss...
For example the relationship with the table AFKO or AFVC with /MRSS/D_DEM_H or /MRSS/D_BAS_ASG....
Regards 
Damy