- From: Yvette Hoitink <y.p.hoitink@heritas.nl>
- Date: Fri, 17 Jun 2005 14:33:11 +0200
- To: "'Roberto Scano \(IWA/HWG\)'" <rscano@iwa-italy.org>, <caldwell@trace.wisc.edu>, <w3c-wai-gl@w3.org>
Roberto Scano asked: > Always regarding 4.1: > > <cite> > Level 1 Success Criteria for Guideline 4.1 SGML-based > delivery units are well-formed. [I] > Note: > This does not require that they are valid. > Non-SGML-based delivery units are formatted according to > their content type specification. [I] </cite> > > Why only sgml-based languages can be not Valid? The level 1 SC is not about validity, but about being well-formed. Well-formed means all opened tags are closed and nested according to spec. For example: <a><b></a></b> is not well-formed. We did this at level 1 because many of the problems with invalid documents are caused by missing close tags or wrong nesting and not by, for example, having an extra attribute that is not in the spec. So at level 1 you would be allowed to say <body valign="top><h1>bladibla</h1></body> but not <body valign="top"><h1>bladibla</body>. However, well-formedness is a concept that does not apply to all technologies but only to technologies that use tags such as XML-based technologies and HTML. That's why we limited the requirement to SGML-based delivery units. Yvette Hoitink Heritas, Enschede, the Netherlands E-mail: y.p.hoitink@heritas.nl WWW: http://www.heritas.nl
Received on Friday, 17 June 2005 12:33:19 UTC