<data:post.timestamp/>

    <span class='updated'><data:post.timestamp/></span>

 <meta expr:content='data:post.firstImageUrl' itemprop='image_url'/>

<meta expr:content='data:post.firstImageUrl' itemprop='image'/>

<meta expr:content='data:blog.blogId' itemprop='blogId'/>

<meta expr:content='data:post.id' itemprop='postId'/>