From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joel Salomon To: 9fans@cse.psu.edu Subject: Re: [9fans] tfel-ot-thgir support In-Reply-To: <009e01c35adc$6e0608a0$b9844051@insultant.net> Message-Id: Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Date: Mon, 4 Aug 2003 19:44:38 -0400 Topicbox-Message-UUID: 11109a74-eacc-11e9-9e20-41e7f4b1d025 > does it solve the general problem of bidirectional text in two dimensions? from http://www.unicode.org/faq/middleeast.html : > Q: Are any scripts written vertically? > > A: > Unlike the bidirectional case, the choice of vertical layout is usually > treated as a formatting style; therefore, the Unicode Standard does not > define default rendering behavior for vertical text nor provide > directionality controls designed to override such behavior. Unicode also does not provide formatting codes for bottom-to-top or boustrophedon scripts. The RTL and LTR are for multiple levels of embedding (LTR within RTL within LTR etc.) so that a sentence like ("logical" order, ALL CAPS are RTL as in unicode examples): AVRAHAM SAID "the first two books of the bible are BERESHITH and SHEMOTH." will print as: "the first two books of the bible are HTIHSEREB and HTOMEHS." DIAS MAHARVA instead of the result of pure algorithmic bidi: ".HTOMEHS and HTIHSEREB the first two books of the bible are" DIAS MAHARVA (Example from "Unicode Demystified", Richard Gillam, Addisson Wesley, 2003) --Joel