<meter> element’s value is not recognized in structured data

Question

According to the Microdata specification,

If the <meter> element has the [value] attribute and it is an itemprop, then the itemprop value should be the value of that [value] attribute.

<div itemscope="" itemtype="http://schema.org/Rating">
  <meta itemprop="worstRating" content="0">
  <meta itemprop="bestRating" content="1">
  <meter min="0" max="1" value="0.4" itemprop="ratingValue">Poor</meter>
</div>

The value of ratingValue should be 0.4, however, it is incorrectly displayed as Poor, which is the textContent of the element.

Test it in Google’s Structured Data Testing Tool. The same result is obtained with Yandex’s Structured Data Validator.

How do I get the machine to recognize the [value] attribute as the correct value?

By the way, any additional info on where I can submit bugs for these tools would be appreciated.

Answer 1

Indeed, this seems to be a bug in their tools.

Two workarounds

• Add a content attribute with the value (valid according to W3C’s current Working Draft of Microdata):

  <meter min="0" max="1" value="0.4" content="0.4" itemprop="ratingValue">Poor</meter>
  

• Move the itemprop to a meta element (valid according to all Microdata specs):

  <meter min="0" max="1" value="0.4">Poor</meter>
  <meta itemprop="ratingValue" content="0.4">