title: Meta tags stopping website from HTML5 validating
body: <p>I am trying to improve the validity of the HTML on my website, but several errors in the meta tags are showing up as invalid, and I'm unsure how to alter them in order to remove the errors.</p>
  
  <pre><code>&lt;meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"&gt;
  </code></pre>
  
  <p><em>Bad value X-UA-Compatible for attribute http-equiv on element meta.</em></p>
  
  <pre><code>&lt;meta name="msvalidate.01" content="4E24196986E1212B82C272A021495004"/&gt;
  </code></pre>
  
  <p><em>Attribute name not allowed on element meta at this point.</em></p>
  
  <pre><code>&lt;meta name="msvalidate.01" content="4E24196986E1212B82C272A021495004"/&gt;
  </code></pre>
  
  <p><em>Element meta is missing required attribute itemprop.</em></p>
  
  <pre><code>&lt;meta name="p:domain_verify" content="5dd1c5f2db0ac0b521f08d56b4cd271b"&gt;
  </code></pre>
  
  <p><em>Attribute name not allowed on element meta at this point.
  Element meta is missing required attribute itemprop.</em></p>
  
  <pre><code>&lt;meta http-equiv="content-language" content="en"&gt;
  </code></pre>
  
  <p><em>Attribute http-equiv not allowed on element meta at this point.
  Element meta is missing required attribute itemprop.</em></p>
  
  <pre><code>&lt;meta http-equiv="content-language" content="en"&gt;
  </code></pre>
  
  <p><em>Using the meta element to specify the document-wide default language is obsolete. Consider specifying the language on the root element instead.</em></p>
  
  <p>Thanks in advance for any help!</p>
  
  <p>D.</p>