Hello Gregg, By <TATWEEL> you mean the Unicode codepoint 0640 Arabic Tatweel? Using 0640 Tatweel in Arabic text on a regular basis is a non-starter. Tatweel is a typographic feature, it shouldn't be encoded in raw text. But a rendering engine could perhaps make use of it by pre-processing raw encoded text and inserting tatweels where desired before sending it to be rendered. An encoder should not have to encode Tatweels on a regular basis in Arabic text.
Regards, Mete ---------- Original Message ---------------------------------- From: Gregg Reynolds <[EMAIL PROTECTED]> Reply-To: General Arabization Discussion <[email protected]> Date: Wed, 03 Aug 2005 11:02:03 -0500 >Thomas Milo wrote: >> Meor Ridzuan Meor Yahaya wrote: >> >> >>>Do you have ideas on arabic justification that you don't mind sharing >>>with us? >> >> >> Yes. Considering keshide or madd a justification aid does not do justice to >> the art of calligraphy or typesetting. Keshide is an esthric device, not a >> trick. It serves to change the general appearance of text, in other words, >> you use them or you don't. If used, in calligraphy and well-executed >> typesetting, keshide is bound to many contextual constraints, which, just >> like the ligature system, are not generally know among computer >> enthousiasts, with devastating consequences for the Islamic art of text >> composition. >> >> To sum it up: justification can very well be achieved by subtle variation in >> intra-word and inner-word spacing. Only as a last resort keshide should be >> used for justification. >> > >Here's my solution: define <TATWEEL> to mean "this place is a candidate >for extension of the line, regardless of coloration", such that it takes >on color based on context. E.g. <k><tatweel><t><b> means the positive >(inked) space between <k> and <t> (i.e. the tiestroke) may be extended. > <d><tatweel><w><r> means the negative space (whitespace) between <d> >and <w> may be extended. The relative extent of such stretching would >be set by typesetting policy in the software. Then there are four >groups of extension candidates: ordinary inter-word negative space, >explicitly specified stretch candidates (using tatweel), and ordinary >intra-word positive (black) and negative (white) space. It's up to the >composition system to set policy regarding how extra space is >distributed among these categories. This is pretty much how the TeX >justification algorithm works. > >-gregg > > -- Mete Kural Touchtone Corporation 714-755-2810 --
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