- From: Geoffrey Sneddon <foolistbar@googlemail.com>
- Date: Sat, 30 Jun 2007 17:05:10 +0100
- To: Ben Boyle <benjamins.boyle@gmail.com>
- Cc: public-html@w3.org
On 30 Jun 2007, at 16:50, Ben Boyle wrote: > I apologise for not "making a use case" at this point. I look forward > to producing some soon. For now I want to let you ponder why we > propose different fallback mechanisms... > - nothing for embed > - text only (@alt) for img > - HTML for video, audio, object Simply: backwards-compatibility. |embed| could have an attribute added to it (but its content model can't be changed without breaking all current UAs). |img| similarly can't have its content model changed. The rest of the elements can have such things in backwards compatible ways (|video| and |audio| due to HTML's handling of unknown elements, and |object| because it is already implemented in that way). - Geoffrey Sneddon
Received on Saturday, 30 June 2007 16:05:17 UTC