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I am marking up my content with schema.org microformats and am wondering about the itemscope attribute. The example given on http://schema.org/docs/gs.html is 

<div itemscope itemtype="http://schema.org/Movie">

Is this valid HTML5? I thought attributes needed values, something like

<div itemscope="itemscope" itemtype="http://schema.org/Movie">
Tom Kincaid
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    It may be valid now however some older parsers may not treat it as such. For example com.sun.org.apache.xerces.internal.parsers.DOMParser.parse will throw a SAXParseException "Attribute name "itemscope" associated with an element type "div" must be followed by the ' = ' character." – Brett Y Nov 26 '19 at 09:31

4 Answers4

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It's a boolean attribute, which is valid HTML5.

If the attribute is present, its value must either be the empty string or a value that is an ASCII case-insensitive match for the attribute's canonical name, with no leading or trailing whitespace.

Tomas M.
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zzzzBov
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If you want to produce valid XHTML5 (as opposed to HTML5 per se, which does not need to be well-formed XML), then @itemscope will need a value. Per the specs for boolean attributes linked by zzzzBov, to be valid XHTML 5 it will need to be one or the other of empty string or the attribute name, i.e. either <div itemscope=""> or <div itemscope="itemscope">

DavidSewell
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As zzzBov said, it is valid HTML5.

Same thing with input fields and other types of content:

<input type="text" value="Text goes here" disabled>

Instead of disabled="disabled", HTML5 reads this as true because disabled is present.

Steph Rose
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Simple answer - <div itemscope itemtype="http://schema.org/Movie"> is correct.

Example usage

Spec on itemscope

myconode
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