Objective of the Default Keyboard Mapping?

[rob-smallshire]

I asked the same question over on the BeebEm Mac repo but I figured it's just as relevant here, and I might be more likely to receive a response.

I'm trying to improve/fix the default keyboard mapping experience on machines which do not have an ISO / UK keyboard layout (I live somewhere where none of the machines I use have UK keyboards), without needing tiresome kmap files which seem largely unnecessary when we can interrogate the host operating system and/or keyboard hardware these days. In my mind the "Default Keyboard Mapping" was intended to be what some other emulators call a "Positional Mapping" where the relative positions of keys on the emulated machine are maintained on the host machine, but I realise this might not be the intent.

One way to answer this question would be to answer "What are the criteria for a 'correct' default keyboard mapping if porting BeebEm to a new platform?"