An ODS can be considered as a table, which means it is different from a Cube, it has only 2 dimensions.

Take an standard ODs from Business Content as an instance: 0CCA_O09 - Cost Center Actuals

1. Settings:

    BEx Reporting - select if you want to report on it;
    Unique data records - select if you do not want loada data record into the ODS object if the key combination already exists; usually not to select it;
    Set quality status to 'OK' automatically;
    Activate ODS object data automatically;
    Update data target from ODS object automatically;

2.  Key Fields:
     
     Controlling Area
     CO Document Number
     Line item of CO Document
     Currency Type
     Key figure Type
     Value type for reporting
     Fiscal year variant

3. Data Fields:
  
    The rest of Char and Key Figures (Key figures are Cumulative Values)