- From: Henri Sivonen <hsivonen@iki.fi>
- Date: Sun, 23 Mar 2008 22:24:29 +0200
- To: public-pfwg-comments@w3.org
WAI-ARIA references XSD datatype which allow whitespace around the value. However, experience with HTML, SVG and MathML implementations shows that even when specs allow leading and trailing whitespace in attribute values, implementations tend not to do so in an interoperable way--especially if the attribute is expected to take one of enumerated possible values. As a result, authors must avoid extra whitespace in order to make their pages work in a robust way. Therefore, for document conformance, I suggest disallowing leading and trailing whitespace except when the value is a list of space-separated tokens (in which case the common design pattern is to require one or more whitespace characters in between tokens and zero or more before and after). (I'm implementing conformance checking according to this suggestion.) -- Henri Sivonen hsivonen@iki.fi http://hsivonen.iki.fi/
Received on Sunday, 23 March 2008 20:25:14 UTC