Declaring Japanese kana vs Adobe apps

[Ray Larabie]

I made a few fonts which feature a fairly well filled out Latin 1 set, a bit of Latin 2 and Japanese hiragana/katakana+Japanese punctuation in their proper Unicode locations.
In the Supported Pages & Default Character Set page, I've added:

• Latin 1
  Latin 2: Eastern Europe
           Macintosh Character Set (US)
  932 JIS Japan

Should I refrain from declaring support for the 932 JIS Japan character set? It's not a full set, only kana (no kanji). Does anyone know the consequences of including or leaving it out? What's the proper way to do it?


Ray Larabie
Typodermic Fonts

[Eigi]

from the spec:
http://www.microsoft.com/typography/otspec/os2.htm#cpr
If the bit is set (1) then the code page is considered functional. If the bit is clear (0) then the code page is not considered functional.
...
The determination of "functional" is left up to the font designer,...

Eigi

[Ray Larabie]

Declaring a Japanese set has adverse effects on OT features as well. Kerning breaks. Ligatures fail. Bad juju occurs in Adobe apps when the Japanese set is declared. It's like a switch that shuts off all OT features and breaks embedding. Perhaps Adobe apps are purposefully coded to automatically shut off kerning and other OT features when a Japanese set is declared.

Does anyone have a clue as to why this might happen?

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