> characters*, we have found that is generally best practice to interpret the
I should make it clear that the "we" above does not refer to the Unicode consortium! Mark __________________________________ http://www.macchiato.com ► “Eppur si muove” ◄ ----- Original Message ----- From: "Mark Davis" <[EMAIL PROTECTED]> To: "John Cowan" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]> Cc: <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]> Sent: Tuesday, December 03, 2002 10:23 Subject: Re: Default properties for PUA characters??? > Ken is correct: the default properties are somewhat different for ideographs > than for PUAs. In addition, PUAs are a special case compared to other > characters; implementations are free, within very broad limits, to change > the default properties associated with a PUA code point to whatever is > appropriate to whatever private-use character definition the application > gives to that code point. > > In other words, an application, if it treats a particular PUA as an > ideograph, is free to change the default properties to match Ken's list (and > for other properties): > > gc=Lo (general category = Other_Letter) > ccc=0 (combining class = 0, i.e. Not_Reordered) > bc=L (bidi class = strong Left_To_Right) > sc=Hani (script = Han) > lb=ID (line break = Ideographic) > ea=W (east asian width = Wide) > > If an application treated a particular PUA character as a Greek Linear B > character, on the other hand, it would assign yet different properties. > > Now in practice, the vast majority of PUA characters in use are representing > ideographs, mapped from East Asian standards. Due to this fact, *in the > absence of other protocols establishing the precise usage of the PUA > characters*, we have found that is generally best practice to interpret the > PUA characters as ideographs. However, applications are free to interpret > them however they want. > > Mark > __________________________________ > http://www.macchiato.com > ► “Eppur si muove” ◄ > > ----- Original Message ----- > From: "John Cowan" <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Cc: <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]> > Sent: Monday, December 02, 2002 21:08 > Subject: Re: Default properties for PUA characters??? > > > > Kenneth Whistler scripsit: > > > > > So I'd say that the XML Core WG has got the situation only > > > partially correct for Unicode PUA characters. > > > > As the actual author of that Core WG text, mea culpa. But I was basing > > my remarks on things said on this list. > > > > -- > > All Gaul is divided into three parts: the part John Cowan > > that cooks with lard and goose fat, the part > www.ccil.org/~cowan > > that cooks with olive oil, and the part that > www.reutershealth.com > > cooks with butter. -- David Chessler > [EMAIL PROTECTED] > > > > > > >
