- From: Karl Dubost <karl@w3.org>
- Date: Mon, 4 Sep 2006 11:12:30 +0900
- To: www-i18n-comments@w3.org, public-i18n-core@w3.org
- Cc: Richard Ishida <ishida@w3.org>, Felix Sasaki <fsasaki@w3.org>
Hi, Unicode 5.0 has been published but it raises some questions. [[[ In UAX #9, "Bidirectional Algorithm," for better interoperability, the algorithm was modified to tighten up the conformance requirements for using mirrored glyphs for characters. Higher level protocols are discouraged, due to interoperability and security considerations. The definition of directional run was changed to be the same as level run, and the use of soft-hyphen with bidi text was clarified. ]]] -- Unicode 5.0.0 http://www.unicode.org/versions/Unicode5.0.0/ Tue, 29 Aug 2006 17:33:36 GMT There are quite a few specifications at W3C which references Unicode normatively. For example HTML 4.01, [[[ dir = LTR | RTL [CI] This attribute specifies the base direction of directionally neutral text (i.e., text that doesn't have inherent directionality as defined in [UNICODE]) in an element's content and attribute values. It also specifies the directionality of tables. Possible values: * LTR: Left-to-right text or table. * RTL: Right-to-left text or table. In addition to specifying the language of a document with the lang attribute, authors may need to specify the base directionality (left- to-right or right-to-left) of portions of a document's text, of table structure, etc. This is done with the dir attribute. ]]] -- Language information and text direction http://www.w3.org/TR/html401/struct/dirlang.html#adef-dir Fri, 24 Dec 1999 23:25:42 GMT (PS: Though HTML 4.01 refers to Unicode 3.0, I wonder if using characters from Unicode 4.0 and 5.0 make the document non conformant.) It seems by new conformance rules of Unicode, that a markup language should not have directionality information at the markup level. But HTML 4.01 specification is mandating the opposite, [[[ The [UNICODE] specification assigns directionality to characters and defines a (complex) algorithm for determining the proper directionality of text. If a document does not contain a displayable right-to-left character, a conforming user agent is not required to apply the [UNICODE] bidirectional algorithm. If a document contains right-to-left characters, and if the user agent displays these characters, the user agent must use the bidirectional algorithm. ]]] -- Language information and text direction http://www.w3.org/TR/html401/struct/dirlang.html#adef-dir Fri, 24 Dec 1999 23:25:42 GMT My question is related to the Good Practice 8 of "QA Framework: Specification Guidelines". [[[ When imposing requirements by normative references, address conformance dependencies. ]]] - http://www.w3.org/TR/qaframe-spec/#ref-define-practice And we give as an example the Charmod 1.0 specification, which gives recommendations for forward normative references. [[[ C063 [S] A generic reference to the Unicode Standard MUST be made if it is desired that characters allocated after a specification is published are usable with that specification. A specific reference to the Unicode Standard MAY be included to ensure that functionality depending on a particular version is available and will not change over time. C064 [S] All generic references to the Unicode Standard [Unicode] MUST refer to the latest version of the Unicode Standard available at the date of publication of the containing specification. C065 [S] All generic references to ISO/IEC 10646 [ISO/IEC 10646] MUST refer to the latest version of ISO/IEC 10646 available at the date of publication of the containing specification. ]]] -- Character Model for the World Wide Web 1.0: Fundamentals http://www.w3.org/TR/2005/REC-charmod-20050215/#sec-RefUnicode Tue, 15 Feb 2005 14:24:00 GMT -- Karl Dubost - http://www.w3.org/People/karl/ W3C Conformance Manager, QA Activity Lead QA Weblog - http://www.w3.org/QA/ *** Be Strict To Be Cool ***
Received on Monday, 4 September 2006 02:13:07 UTC