正确使用Schema.org"ImageObject"

Question

我怀疑正确使用架构ImageObject.

我有一个小图像和一个链接,以更大的尺寸查看它,但我不知道这三种形式是否正确.

<span itemprop='image' itemscope itemtype='http://schema.org/ImageObject'>
<a href='big_1280x720.jpg' itemprop='contentUrl'><img src='small_90x60.jpg' itemprop='image'></a>
</span>

<span itemprop='image' itemscope itemtype='http://schema.org/ImageObject'>
<a href='big_1280x720.jpg' itemprop='image'><img src='small_90x60.jpg' itemprop='thumbnailUrl'></a>
</span>

<span itemprop='image' itemscope itemtype='http://schema.org/ImageObject'>
<a href='big_1280x720.jpg' itemprop='contentUrl'><img src='small_90x60.jpg' itemprop='thumbnailUrl'></a>
</span>

Answer 1

第三个删除第一个出现的itemprop ='image'是正确的.

<div itemscope itemtype='http://schema.org/ImageObject'>
  <a href='big_1280x720.jpg' itemprop='contentUrl'>
    <img src='small_90x60.jpg' itemprop='thumbnailUrl'>
  </a>
</div>