On 19 Aug 2011, at 15:57, Doug Ewell wrote: > Most applications don't care about the PUA, or assume it's only for that > particular vendor's custom Latin-script ligatures and dictionary symbols.
And guess what: since my ligatures and dictionary symbols are LTR, I have no problem because the applications assume LTR directionality, just as they should. > But you are certainly able to define the properties, and doing so is the > conformant thing to do. Directionality is a very deep property. A CSUR LTR script works fine out of the box on all platforms at least as far as directionality goes. A CSUR RTL script simply can't, and do you really think that "defining the properties" will effectively override the system-level expectations for LTR PUA on multiple platforms? Very very very unlikely. Michael Everson * http://www.evertype.com/
