- From: L. David Baron <dbaron@fas.harvard.edu>
- Date: Tue, 13 Aug 2002 09:34:23 -0400
- To: www-style@w3.org
On Tuesday 2002-08-13 09:50 +0200, Håkon Wium Lie wrote: > Also sprach Coises: > > This change might also present difficulties for user agents which could > > otherwise implement user-selected presentational defaults as a (real or > > virtual) user style sheet; it would instead be necessary to modify the > > (real or virtual) user agent default style sheet to set these defaults. I don't see any reason the "virtual" UA stylesheet would need to be merged with the existing one in any way, since (1) users can't actually see the specificity of the selectors in the UA stylesheets and the presentational hints that aren't implemented as CSS rules don't even have a clearly defined specificity and (2) the things that are considered presentational hints (largely, if not entirely, attributes) are things that should override everything else in the UA stylesheet. In other words, I think the presentational hints could be implemented as their own level of the cascade between the UA and user level without sorting rules based on specificity and order. That said, the new text is less precise than the old text since it doesn't define the specificity of the presentational hints, and therefore doesn't define how they interact with the rest of the UA stylesheet. Would it make sense to avoid this problem by saying that the presentational hints are at their own level of the cascade, between the UA level and user level? Or would it be better to resolve the problem by saying that the specificity of the style from presentation hints is implementation-defined? -David -- L. David Baron <URL: http://www.people.fas.harvard.edu/~dbaron/ >
Received on Tuesday, 13 August 2002 09:34:34 UTC