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which format of meta data is correct? link vs meta?

which one of these format is correct? 

  <meta itemprop="thumbnailurl" content="/design/glogo.jpg" />
  <meta itemprop="sameas" content="http://examle.com" />
  <meta itemprop="image" content="/design/glogo.jpg" />
  <meta property="og:url" content="http://127.0.0.1/" />

or

  <link itemprop="thumbnailurl" content="/design/glogo.jpg" />
  <link itemprop="sameas" content="http://examle.com" />
  <link itemprop="image" content="/design/glogo.jpg" />
  <link property="og:url" content="http://127.0.0.1/" />
Solution

  • If the value is an URI, use link.

    But note that using the content attribute on link is only allowed in RDFa. You probably want to use the href attribute instead:

    <link itemprop="thumbnailurl" href="/design/glogo.jpg" />
<link itemprop="sameas" href="http://examle.com" />
<link itemprop="image" href="/design/glogo.jpg" />
<link property="og:url" href="http://127.0.0.1/" />