The difference between Logical Tables, Logical Table Sources (LTS) and the physical tables that compose a Logical Table Source, here are some basic guidelines that have helped me get this concept to seat more clearly in my mind.
How to handle cases where configuration tables like PS_GVT_POI_TBL or other feature sets that don’t apply to your company are not being implemented. In many cases complete dimensions will be empty and look-ups in fact jobs will fail.