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<p class=MsoNormal>This list seems pretty quiet now; if there is a better list
/ forum to ask this, please advise. (Also, to avoid misinterpretation, I am
not on the IE team and do not speak for the IE team's plans.) <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Section 9.2.5.10 of the latest version of the spec contains
this text under the rule for the "a" start tag:<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-family:"Arial","sans-serif"'>In
the non-conforming stream </span><code><span style='font-size:10.0pt'><a href="a">a<table><a href="b">b</table>x</span></code><span
style='font-family:"Arial","sans-serif"'>, the first </span><code><span
style='font-size:10.0pt'><a
href="http://www.whatwg.org/specs/web-apps/current-work/multipage/text-level-semantics.html#the-a-element">a</a></span></code><span
style='font-family:"Arial","sans-serif"'> element would be closed upon seeing
the second one, and the "x" character would be inside a link to
"b", not to "a". This is despite the fact that the outer </span><code><span
style='font-size:10.0pt'><a
href="http://www.whatwg.org/specs/web-apps/current-work/multipage/text-level-semantics.html#the-a-element">a</a></span></code><span
style='font-family:"Arial","sans-serif"'> element is not in table scope
(meaning that a regular </span><code><span style='font-size:10.0pt'></a></span></code><span
style='font-family:"Arial","sans-serif"'> end tag at the start of the table
wouldn't close the outer </span><code><span style='font-size:10.0pt'><a
href="http://www.whatwg.org/specs/web-apps/current-work/multipage/text-level-semantics.html#the-a-element">a</a></span></code><span
style='font-family:"Arial","sans-serif"'> element).<o:p></o:p></span></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>This is consistent with the behavior when feeding this
example to <span style='color:#1F497D'><a
href="http://james.html5.org/parsetree.html">http://james.html5.org/parsetree.html</a></span>
which outputs:<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span lang=EN style='font-size:10.0pt;font-family:"Courier New";
color:black'>|</span><span lang=EN style='font-size:10.0pt;font-family:"Courier New";
color:black'>html</span><span lang=EN style='font-size:10.0pt;font-family:"Courier New";
color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN style='font-size:10.0pt;font-family:"Courier New";
color:black'> |</span><span lang=EN style='font-size:10.0pt;font-family:"Courier New";
color:black'>head</span><span lang=EN style='font-size:10.0pt;font-family:"Courier New";
color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN style='font-size:10.0pt;font-family:"Courier New";
color:black'> |</span><span lang=EN style='font-size:10.0pt;font-family:"Courier New";
color:black'>body</span><span lang=EN style='font-size:10.0pt;font-family:"Courier New";
color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN style='font-size:10.0pt;font-family:"Courier New";
color:black'> |</span><span lang=EN style='font-size:10.0pt;font-family:
"Courier New";color:black'>a</span><span lang=EN style='font-size:10.0pt;
font-family:"Courier New";color:black'> </span><span lang=EN style='font-size:
10.0pt;font-family:"Courier New";color:black'>href</span><span lang=EN
style='font-size:10.0pt;font-family:"Courier New";color:black'>=</span><span
lang=EN style='font-size:10.0pt;font-family:"Courier New";color:black'>"a"</span><span
lang=EN style='font-size:10.0pt;font-family:"Courier New";color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN style='font-size:10.0pt;font-family:"Courier New";
color:black'> |</span><span lang=EN style='font-size:10.0pt;font-family:
"Courier New";color:black'>#text: a</span><span lang=EN style='font-size:10.0pt;
font-family:"Courier New";color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN style='font-size:10.0pt;font-family:"Courier New";
color:black'> |</span><span lang=EN style='font-size:10.0pt;font-family:
"Courier New";color:black'>a</span><span lang=EN style='font-size:10.0pt;
font-family:"Courier New";color:black'> </span><span lang=EN style='font-size:
10.0pt;font-family:"Courier New";color:black'>href</span><span lang=EN
style='font-size:10.0pt;font-family:"Courier New";color:black'>=</span><span
lang=EN style='font-size:10.0pt;font-family:"Courier New";color:black'>"b"</span><span
lang=EN style='font-size:10.0pt;font-family:"Courier New";color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN style='font-size:10.0pt;font-family:"Courier New";
color:black'> |</span><span lang=EN style='font-size:10.0pt;font-family:
"Courier New";color:black'>#text: b</span><span lang=EN style='font-size:10.0pt;
font-family:"Courier New";color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN style='font-size:10.0pt;font-family:"Courier New";
color:black'> |</span><span lang=EN style='font-size:10.0pt;font-family:
"Courier New";color:black'>table</span><span lang=EN style='font-size:10.0pt;
font-family:"Courier New";color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN style='font-size:10.0pt;font-family:"Courier New";
color:black'> |</span><span lang=EN style='font-size:10.0pt;font-family:
"Courier New";color:black'>a</span><span lang=EN style='font-size:10.0pt;
font-family:"Courier New";color:black'> </span><span lang=EN style='font-size:
10.0pt;font-family:"Courier New";color:black'>href</span><span lang=EN
style='font-size:10.0pt;font-family:"Courier New";color:black'>=</span><span
lang=EN style='font-size:10.0pt;font-family:"Courier New";color:black'>"b"</span><span
lang=EN style='font-size:10.0pt;font-family:"Courier New";color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN style='font-size:10.0pt;font-family:"Courier New";
color:black'> |</span><span lang=EN style='font-size:10.0pt;font-family:
"Courier New";color:black'>#text: x</span><span lang=EN style='font-size:10.0pt;
font-family:"Courier New";color:black'><o:p></o:p></span></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>My personal implementation delivers identical results, and
my reading of the spec is that this is compliant output given the definition of
tree construction -- the second <a> tag gets foster parented under the
first <a> tag, because the first <a> tag is selected as the foster
parent element when the second <a> tag is encountered.<o:p></o:p></p>
<p class=MsoNormal><br>
Of course, it is not actually HTML-compliant output, because of nested
<a> tags, which are invalid.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>So it appears that the HTML 5 tree construction algorithm
produces invalid HTML in the case of this non-compliant input. IE gets it even
worse, but Firefox seems to get it more correct:<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span lang=EN style='font-size:10.0pt;font-family:"Courier New";
color:black'>|</span><span lang=EN style='font-size:10.0pt;font-family:"Courier New";
color:black'>html</span><span lang=EN style='font-size:10.0pt;font-family:"Courier New";
color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN style='font-size:10.0pt;font-family:"Courier New";
color:black'> |</span><span lang=EN style='font-size:10.0pt;font-family:"Courier New";
color:black'>head</span><span lang=EN style='font-size:10.0pt;font-family:"Courier New";
color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN style='font-size:10.0pt;font-family:"Courier New";
color:black'> |</span><span lang=EN style='font-size:10.0pt;font-family:"Courier New";
color:black'>body</span><span lang=EN style='font-size:10.0pt;font-family:"Courier New";
color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN style='font-size:10.0pt;font-family:"Courier New";
color:black'> |</span><span lang=EN style='font-size:10.0pt;font-family:
"Courier New";color:black'>a</span><span lang=EN style='font-size:10.0pt;
font-family:"Courier New";color:black'> </span><span lang=EN style='font-size:
10.0pt;font-family:"Courier New";color:black'>href</span><span lang=EN
style='font-size:10.0pt;font-family:"Courier New";color:black'>=</span><span
lang=EN style='font-size:10.0pt;font-family:"Courier New";color:black'>"a"</span><span
lang=EN style='font-size:10.0pt;font-family:"Courier New";color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN style='font-size:10.0pt;font-family:"Courier New";
color:black'> |</span><span lang=EN style='font-size:10.0pt;font-family:
"Courier New";color:black'>#text: a</span><span lang=EN style='font-size:10.0pt;
font-family:"Courier New";color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN style='font-size:10.0pt;font-family:"Courier New";
color:black'> |</span><span lang=EN style='font-size:10.0pt;font-family:
"Courier New";color:black'>a</span><span lang=EN style='font-size:10.0pt;
font-family:"Courier New";color:black'> </span><span lang=EN style='font-size:
10.0pt;font-family:"Courier New";color:black'>href</span><span lang=EN
style='font-size:10.0pt;font-family:"Courier New";color:black'>=</span><span
lang=EN style='font-size:10.0pt;font-family:"Courier New";color:black'>"b"</span><span
lang=EN style='font-size:10.0pt;font-family:"Courier New";color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN style='font-size:10.0pt;font-family:"Courier New";
color:black'> |</span><span lang=EN style='font-size:10.0pt;font-family:
"Courier New";color:black'>#text: b</span><span lang=EN style='font-size:10.0pt;
font-family:"Courier New";color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN style='font-size:10.0pt;font-family:"Courier New";
color:black'> |</span><span lang=EN style='font-size:10.0pt;font-family:
"Courier New";color:black'>table</span><span lang=EN style='font-size:10.0pt;
font-family:"Courier New";color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN style='font-size:10.0pt;font-family:"Courier New";
color:black'> |</span><span lang=EN style='font-size:10.0pt;font-family:
"Courier New";color:black'>#text: x</span><span lang=EN style='font-size:10.0pt;
font-family:"Courier New";color:black'><o:p></o:p></span></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Is this known? Already planned to be fixed? Or is this a
known bug that will ship?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>My apologies if this example has already been discussed; pointers
on finding that earlier discussion will help me learn to fish.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Thanks,<o:p></o:p></p>
<p class=MsoNormal>Rob Jellinghaus<o:p></o:p></p>
<p class=MsoNormal>Microsoft Technical Strategy Incubation<o:p></o:p></p>
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