On 2/16/2018 8:22 AM, Ken Whistler wrote:
The Egyptian quadrat controls, on the other hand, are full-fledged Unicode format controls.
One more point of distinction: The (gc=So) IDC's follow a syntax that uses Polish notation order for the descriptive operators (inherited from the intended use in GB 18030, where these came from in the first place). That order minimizes ambiguity of representation without requiring bracketing, but it has the disadvantage of being hard for humans to interpret easily in complicated cases.
The Egyptian format controls use an infix notation, instead. That follows current Egyptologists' practice of representing quadrats with MdC conventions. It is also a better order for the layout engine processing. The disadvantage is that it requires a bracketing notation to deal with ambiguities of operator precedence in complicated cases.
--Ken
