Table T005S and T005U

Hi abappers,

I´m confused; I want know if table T005S and T005U contain business data (functional data) or contain technical data and Why?

I need know the name table that intervene on t-code OVK2,

I think that only the table T005S and T005U do it and contain technical data both, because the package corresponding to tables is SDKR and I see (double click on SDKR) that Appl. component field contain BC-DWB-DIC-AC.

Is it correct?

At last, What´s the difference between T005S and T005U?

Can you help me, please?

Cordial greetings