- From: Sam Ruby <rubys@intertwingly.net>
- Date: Thu, 01 Apr 2010 19:33:12 -0400
- To: Philip Taylor <pjt47@cam.ac.uk>
- CC: Jonas Sicking <jonas@sicking.cc>, HTML WG <public-html@w3.org>, Technical Architecture Group <www-tag@w3.org>
On 04/01/2010 02:41 PM, Philip Taylor wrote: > Jonas Sicking wrote: >> On Fri, Mar 26, 2010 at 1:52 PM, Sam Ruby <rubys@intertwingly.net> wrote: >>> I took an action item from the TAG yesterday to convey the following >>> request: >>> >>> The W3C TAG requests there should be in TR space a document >>> which specifies how one can create a set of bits which can >>> be served EITHER as text/html OR as application/xhtml+xml, >>> which will work identically in a browser in both bases. >>> (As Sam does on his web site.) >>> >>> This request requires a lot of explanation. To start, it is >>> recognized up >>> front that this will be a subset of the set of possible documents >>> that can >>> be expressed as HTML5. This is entirely OK. For example, if it were >>> to be >>> the case that such a subset were to entirely disallow scripts of any >>> kind, >>> that would be acceptable as there exists a substantial class of >>> documents >>> which do not require scripting of any kind. >> >> Out of curiosity, what does "work identically" encompass? Do they have >> to have the same DOM? Or just render the same when the default UA >> stylesheet is applied? Or just be semantically equivalent? >> [...] >> If DOMs aren't important, only rendering is, I assume that this >> document won't qualify: >> >> <html xmlns="http://www.w3.org/1999/xhtml"> >> <head> >> <style> tbody { background: green } </style> >> <title>example document</title> >> </head> >> <body> >> Integer values for true/false. >> <table> >> <tr><td>true</td><td>1</td></tr> >> <tr><td>false</td><td>0</td></tr> >> </table> >> </body> >> </html> > > This one would also render differently: > > <html xmlns="http://www.w3.org/1999/xhtml"> > <head><title>example document</title></head> > <body> > <pre> > Arbitrary example text</pre> > </body> > </html> > > and this one will also cause data corruption depending on the content-type: > > <html xmlns="http://www.w3.org/1999/xhtml"> > <head><title>example document</title></head> > <body> > <form> > Edit your comment: > <textarea name="comment"> > Your previous text</textarea> > </form> > </body> > </html> > > (because the text/html parser strips a leading newline character in > pre/textarea/listing elements), which seem like more serious issues than > the <tbody>, since (unless I'm missing something) it's impossible to > safely use these elements in polyglot documents, unless you do > > <pre><!----> > text > </pre> > > which is a horrid hack and won't work for textarea anyway. So I think a > true polyglot subset would have to exclude the textarea element, which > limits its usefulness further. (Maybe the remaining subset is still > large enough to be worth specifying in detail.) I have a textarea on my individual blog entry pages. I serve those pages as text/html to IE (including the current Platform Preview), and as application/xhtml+xml to pretty much everyone else. To date, I have not had a single complaint on this issue you describe. And have had comments left by plenty of people using a diverse variety of browsers. It is my hope that the document produced can avoid superlatives like "serious", "impossible" and "horrid" when discussing this limitation. - Sam Ruby
Received on Thursday, 1 April 2010 23:33:51 UTC