Rocket Validator automatically scans your sites for accessibility issues using the W3C Validator,
hosted on our own servers and integrated into our web crawler.
HTML issues tagged as itemscope.
An itemprop attribute has been found in the document, but it cannot be associated to any item. Most probable cause is the lack of an itemscope attribute defining an item.
Microdata allows nested groups of properties, which must be scoped to the item they belong to, as in this example:
<p>My name is <span itemprop="name">Liza</span> and I'm <span itemprop="age">48</span> years old.</p>