- From: Jim Jewett <jimjjewett@gmail.com>
- Date: Tue, 31 Jul 2007 18:00:03 -0400
- To: public-html@w3.org
In http://lists.w3.org/Archives/Public/public-html/2007Jul/1261.html, [ valid ID characters are ] >>> Any character minus space characters. [so you can have an id of "1" or "$^&"] Sander Tekelenburg asked >> How do existing (pre-HTML5) UAs handle this? Anne van Kesteren wrote: > Anyway, they handle it fine. In CSS you might > have to escape certain characters because the IDENT > production does not always allow them to occur literally. That is an important enough limit that it should probably be included in the good authoring advice, even if not in the actual grammar. Perhaps something like: Authors wishing to write robust applications are advised to use a more restricted set of IDs. While "1" and $^&" are technically valid identifiers, they will trigger bugs in some tools. Therefore, authors SHOULD stick to ID characters from the ASCII digits [0-9] and one case of ASCII letters (either [a-z] or [A-Z]), and SHOULD ensure that the first character of each ID is a letter rather than a digit. This probably applies to the name attribute as well. -jJ
Received on Tuesday, 31 July 2007 22:00:06 UTC