At 19:36 +0300 2002-07-04, John Hudson wrote: >This is not Mac-only behaviour. So far I have yet to see a single >OpenType font that uses the ZWJ to produce ligatures: they all >proceed on the basis of applying a layout feature to regular text >and affecting any sequence (e.g. f i) found in the feature coverage >table in the font. Ironically, inserting a ZWJ in such a sequence is >more likely to break a ligature than it is to form one.
A Runic OT font will want to use ZWJ and not another protocol. I confess that when typesetting books for publication I do replace fi with the hardcoded Mac Roman ligature because Quark doesn't seem to do the replacement itself even if the option is turned on. This in itself wrecks searching operations. -- Michael Everson *** Everson Typography *** http://www.evertype.com