- From: Dão Gottwald <dao@design-noir.de>
- Date: Fri, 13 Apr 2007 10:47:53 +0200
- To: Matthew Ratzloff <matt@builtfromsource.com>
- CC: public-html@w3.org
No other browsers need the versioning, because they are close enough to existing standards, and new standards will be backwards-compatible. Hence 2. --Dao Matthew Ratzloff schrieb: > > Everyone, > > There's currently a lot of back and forth on the list but very little > concrete has been laid out. > > As I see it, these are four possible solutions to this problem of > "opt-in" rendering. I've added a few pros and cons--I'm sure others > have more in mind. > > 1. Provide no opt-in switch, but do not write the specification in such > a way that breaks content in Internet Explorer. This, in effect, means > adding to the spec the IE-specific bugs that at least 1% of websites > coded with IE in mind rely upon. > > + One specification governs all behavior; easy for authors > - IE bugs are introduced into the specification > - Deprecating, removing, or otherwise specifying a change in usage is > severely limited > > 2. Make no allowances for browsers that do not comply with the standard > as specified. Require that these browsers implement their own opt-in > mechanisms (a la IE's conditional comments). > > + Specification does not inherit UA-specific bugs > - Could ultimately result in Microsoft not implementing or only > partially implementing specification when spec differs significantly and > no clear way to opt in > > 3. Allow authors to peg pages to an HTML version. This might take the > form of a DOCTYPE switch, an <html version="5.0"> attribute, or some > other means. > > + Content will always render the same as it does today > + Elements can be changed and deprecated as deemed necessary > - If a rendering bug becomes prevalent and is subsequently fixed, is > the specification updated to account for this? HTML 5.1? HTML 5.2? > - Introduces significant barriers to new browser development, since > browser makers must version their rendering engine > - What happens if a page specified for HTML 5 is later updated (as, > for example, by a different author) only to use a new element from HTML > 6, but has content dependent on HTML 5 rendering? > - IE conditional comments are still needed for compatibility with > older versions > > 4. Allow authors to peg pages to the latest browser versions that the > page has been tested in and guaranteed to work with. This might take > the form of: > > <meta name="User-Agent" value="Internet Explorer 7.0" /> > <meta name="User-Agent" value="Firefox 2.0" /> > <meta name="User-Agent" value="Safari 2.0" /> > <meta name="User-Agent" value="Opera 9.2" /> > > In this case, it would obviously be better to peg it to rendering > engines and not browsers themselves, but that's probably asking too > much. AOL, Camino, Netscape, Konqueror, et al would just have to check > for the most common strings that match their rendering engine. > > + Content will always render the same as it does today > + Elements can be changed and deprecated as deemed necessary > - Introduces significant barriers to new browser development, since > browser makers must version their rendering engine > - What happens if a page specified for Internet Explorer 7 is later > updated only to use a new element defined in IE 8, but has content > dependent on IE 7 rendering? > - IE conditional comments are still needed for compatibility with > older versions > > Thoughts? > > -Matt > > On Apr 12, 2007, at 22:46, James Graham wrote: >> the only solution I can see is to force authors to specify their >> opt-in to the bugs and features of a particular UA using e.g. <meta >> name="ua-version" value="IE7"> to specify IE7+ should work in IE7 >> mode when rendering the document. > >
Received on Friday, 13 April 2007 08:48:38 UTC