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Specification: http://www.whatwg.org/specs/web-apps/current-work/multipage/microdata.html Multipage: http://www.whatwg.org/C#values Complete: http://www.whatwg.org/c#values Comment: Why is <date itemprop="when">2011-07-23</date> disallowed? Posted from: 81.234.240.242 User agent: Opera/9.80 (X11; Linux x86_64; U; Edition Next; en) Presto/2.9.181 Version/12.00
"If a property's value represents a date, time, or global date and time, the property must be specified using the datetime attribute of a time element." Only requiring that a time element is used seems more appropriate, as in some cases the text content of <time> is already on the form YYYY-MM-DD and thus doesn't need to be overridden using datetime="".
On second thought the entire constraint is weird, filed http://www.w3.org/Bugs/Public/show_bug.cgi?id=13370 instead
mass-move component to LC1