The basic premise of the central library system requires it. You are thinking backwards - the categories are created under the partitions, not the other way around.
What you can do is create an "IC" partition that has ll of your IC parts, those parts use symbols from your "opamp" partition and PCB decals from your "SOIC" partition. The Parts or Symbols categories can be empty in a partition you use for SOICs, and the other ways around.
I'm not sure I've followed the question/issue entirely, but when you create any new library, PADS creates 4 sub entities, & any of those can be empty. ie They show up in the LIB list, but have nothing in them ( It is common for the 2D lines Library to be empty (file size `17KB) in most cases).
Created are :
- Name.ld9 = Logic Decals (schematic Sheet symbols)
- Name.pd9 = PCB Layout Decals (PCB footprints / land patterns)
- Name.pt9 = Part-Type info, shared between Logic and Layout, with Pin Names/Types/SwapInfo/SigPin/AltDecal Lists etc
- Name.ln9 = 2D lines Library, Combined 2D Lines & Text, visible from both Logic and Layout
If you want to create a shared Decal library, just leave the other 3 areas empty (ignore them) and place the DecalLib higher in the LIB search list.
It is the way it has been implemented currently, it is under review.
Does the VX.1 version will include the possibility to create different partitions under PARTS, DECAL and SYMBOLS category?
Actually that is incorrect, yes the Central Library requires partitions but it should not require identical and empty partitions for each object type. For instance your Border Symbols will never go to layout so don't need a Decal or Part partition. This is not how the Central Library is intended to work, it comes from the Xpedition flow and there you have only the partitions you require under each category not duplicated empty partitions.
No not in VX.1 but it is still under review.