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URL where the problem was first discovered ------------------------------------------ http://test.csswg.org/suites/css2.1/20100815/html4/viewport-004.htm Relevant code ------------- <frameset cols="*,*"> <frame src="support/viewport-004-firstcanvas.htm"></frame> <frame src="support/viewport-004-secondcanvas.htm"></frame> <noframes> <body> <p>Test passes if this text is visible.</p> </body> </noframes> </frameset> W3C Markup Validator version ---------------------------- v1.1 The W3C validator error message { end tag for element "FRAME" which is not open (check earlier errors) .} seems to indicate that start tag <frame> is not seen. I have checked with other validators ( WDG, http://validator.progysm.com/check.php , http://valet.webthing.com/page/validate ) and the error message is the same. </frame> end tag is optional: <!ELEMENT FRAME - O EMPTY -- subwindow --> http://www.w3.org/TR/html4/present/frames.html#h-16.2.2 I can create a reduced testcase if required, requested. regards, Gérard
(In reply to comment #0) > </frame> end tag is optional: > <!ELEMENT FRAME - O EMPTY -- subwindow --> > http://www.w3.org/TR/html4/present/frames.html#h-16.2.2 http://www.w3.org/TR/html401/intro/sgmltut.html#h-3.3.3 | The hyphen and the following "O" indicate that the end tag can be omitted, but | together with the content model "EMPTY", this is strengthened to the rule that | the end tag must be omitted.
Ville, Good catch! I missed that completely! Thank you! Marking as VERIFIED regards, Gérard