On Mon, Jun 15, 2015, Doug Ewell wrote: > At least it was possible to implement the old ISO 9995-3 standard on > Windows, treating Group 2, Levels 1 and 2 as if they were Group 1, > Levels 3 and 4 -- in other words, by using AltGr and Shift+AltGr.
The US International keyboard layout indeed conforms to ISO/IEC 9995. AFAIK it was preexistent, and was validated for conformance by considering that the AltGr and Shift + AltGr shift states contain the secondary group. I did not think about it as an _implementation_ of ISO/IEC 9995. > The new ISO 9995-3 standard isn't implemented anywhere, and can't be as > long as no specification exists to access the additional groups and > shift states without adding more physical keys. "Figure it out for > yourself" is not a specification. The new German standard keyboard layouts T2 and T3 are ISO/IEC 9995. Other national keyboard layouts before them are, too. There is exactly a Group 1 with three levels and a Group 2 with two. Marcel Schneider