L2/03-276 Subject: ZWJ/ZWNJ proposed general category change From: Kent Karlsson Date: August 21, 2003 Hi! Could you put up the text below as a UTC document, and add UTC agenda item. I could make a nicer (and a bit longer) document about this, if either of you think that is needed, but the next UTC meeting is soon... Kind regards /kent k --------------------- I would suggest reclassifying ZWJ and ZWNJ as combining marks, i.e. Mn instead of Cf as "general category". They would have to keep their combining class of 0, in order not to change any normal forms. As I've mentioned, I think class 0, with its special treatment is problematic, and hence ZWJ and ZWNJ should not be "acknowledged" just anywhere in any combining sequence. There is no problem to have them at the end of a combining sequence, that is what has to all intents and purposes been the case all the time, even as Cf *just after* a combining sequence. "New" cases, that are not "acknowledged" with ZWJ/ZWNJ as Cf, but should be with ZWJ/ZWNJ as Mn: just after a base character (even when followed by more combining characters) [this takes care of the Khmer cases], between two combining marks in a combining sequence that would be in canonical order *if* the ZWJ/ZWNJs were removed from the sequence (this may take care of some Hebrew ligation cases, I'm not sure). Other placements of ZWJ/ZWNJ should not be "acknowledged", but should be deprecated. ZWJ/ZWNJ would remain "default ignorable".