Physical Domain: Physical Domain Item Kind Viewpoint missing?

[MarkusAndres]

Is there a viewpoint missing für Physical Domain Item Kind.

What is the difference between SAF_PhysicalItem and SAF_PhysicalExchangeType or Physical Exchange Kind?

see:

• https://github.com/GfSE/SAF-Specification/blob/main/viewpoints/Physical-Logical-Item-Mapping-Viewpoint.md
• https://github.com/GfSE/SAF-Specification/blob/main/viewpoints/Physical-Interface-Definition-Viewpoint.md