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Feedback from David Baron: November TPAC meeting: http://lists.w3.org/Archives/Public/www-style/2011Nov/0714.html Email from David: https://lists.w3.org/Archives/Member/w3c-css-wg/2011OctDec/0371.html Action Item for David to provide description of the problem for insertion in the spec: https://www.w3.org/Style/CSS/Tracker/actions/415
(Issue description from DBaron's ACTION-415) These rules for exclusions order and exclusions on absolutely positioned elements (particularly those with static position) build this exclusions model on top of the absolute positioning model in CSS Level 2, rather than on top of floats, the existing exclusion model in CSS Level 1 and 2. The CSS Working Group has not reached consensus on whether it intends to base the new exclusions features in this specification on top of absolute positioning (as these sections of this specification do) or on top of floats.
Changed issue description: The current draft provides a model for exclusions without a collision-avoidance model. The existing exclusion model in CSS uses floats, which have both exclusion and collision-avoidance behavior. Concerns have been raised that allowing exclusions without collision avoidance could be harmful, particularly with absolutely-positioned elements. Three options should be considered: 1. Allow exclusions in positioning schemes with no collision avoidance 2. Disallow exclusions in positioning schemes with no collision avoidance 3. Define collision-avoidance behavior for positioning schemes without it, and use this behavior by default with exclusions. https://dvcs.w3.org/hg/csswg/rev/d238b1e9c4ac
Moved to GitHub issue: https://github.com/w3c/csswg-drafts/issues/3564