I use the Standard/Business Content DataSource "2LIS_11_VAITM". In case of generic DataSources I can use t/code RSO2 to change the definition of the DataSource and the generic delta settings (http://scn.sap.com/thread/636987).
But I don´t use a generic DataSource. How I can check or change the definition and the delta settings of standard DataSources (e.g. 2LIS_11_VAITM)?