如何为blogger添加完美的facebook开放图元标记

我正在尝试添加此代码这是添加此代码的正确方法或此代码中的任何错误。我目前在blogger上运行我的网站

    <b:if cond='data:blog.pageType == "item"'>
<meta expr:content='data:blog.pageName' property='og:title'/>
<meta expr:content='data:blog.canonicalUrl' property='og:url'/>
<meta content='article' property='og:type'/>
</b:if>
<meta expr:content='data:blog.title' property='og:site_name'/>
<b:if cond='data:blog.postImageThumbnailUrl'>
<meta expr:content='data:blog.postImageThumbnailUrl' property='og:image'/>
<b:else/>
<meta content='logo-link' property='og:image'/>
</b:if>
<b:if cond='data:blog.metaDescription != ""'>
<meta expr:content='data:blog.metaDescription' name='og:description'/>
</b:if>
<meta content='app_id' property='fb:app_id'/>
<meta content='fb_admins' property='fb:admins'/>

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应更改下一行。从