HI,
info source is the logical object, we combine the all objects (source and target) make as once object.
it is not contain any data like PSA and DSO.it does not contain data.
you can create the direct dso and cube.
below like this your flow.
1.data source -> transformation -> dso-> cube
2. data source -> info source -> transformation -> dso-> cube.
Thanks,
Phani.