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<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-US
style='font-size:10.0pt;font-family:Arial;color:navy'>data-* attributes allow
XML name characters and they are converted to lower case in HTML (ASCII, AIUI).<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-US
style='font-size:10.0pt;font-family:Arial;color:navy'>BTW, editorial correction
for <a
href="http://www.whatwg.org/specs/web-apps/current-work/multipage/dom.html#embedding-custom-non-visible-data">3.3.3.8</a>:
should be “<u>its name</u> contains no characters in the range” (because
an attribute contains its value).<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-US
style='font-size:10.0pt;font-family:Arial;color:navy'>Chris</span></font><o:p></o:p></p>
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