From: Doug Ewell (dewell@adelphia.net)
Date: Mon Jul 26 2004 - 10:40:10 CDT
Mark Davis wrote:
> In practice, the keyboards I have seen with an additional level
> generally need and use a pair of additional levels. The issue is that
> if a lowercase character x is on a level, then you want to be able to
> get the uppercase version of it X by using that same level plus a
> shift key. So in practice you end up with plain, plain+shifted,
> alternate, alternate+shifted.
Keyboards that follow this peculiar requirement of ISO 9995 (three
levels but not four) pay a penalty when there are too many letters
(accented or otherwise) to fit in Levels 1 and 2, and the national
custom is *not* to use combining dead keys. Either the capital and
small versions of a letter must be on different keys within the same
level (Polish puts đ at AltGr+S and Đ at AltGr+D) or the capital letter
is not assigned to a key at all (Italian has è and é but not È or É,
which forces users to type E' when starting a sentence with "It is").
-Doug Ewell
Fullerton, California
http://users.adelphia.net/~dewell/
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