Diff between global hard keep out and soft keep out?

Hard Blockage: placement blockage used to block the placement of cells around the macro with specific offset from macro boundaries (4 sides)..

Soft Blockage: It is kind of placement blockage used to block the placement of cells around the macro with specific offset from macro boundaries.. but can allows the cell placement of cells during placement optimization & placement legalization..

Here Global refers to all the macros in the design with fixed attribute...