Export datasource

Is it possible that and export datasource is a datasource for the same Datatarget.

Ex. 8ZSC_O01 is a datasource for ODS ZSC_O01.

8ZSC_o01 is an export datsource generated from ZSC_O01 right?

Why is it updating the same ODS? I am confused i guess.

Pleas explain.

Thanks, points will be asigned