Nicolas Bernier

<p>Seamless schema automatically inserts Schema.org and Open Graph metadata inside the page header to improve SEO and social network display. The metadata is extracted by default from the blog content data such as the page title, the post excerpt, the thumbnail image but it can be completed for each blog post, page and attachment using the provided metadata editor for simple properties and even within the page’s HTML code for the more complex ones.</p>
<h3>Configuration</h3>
<p>Configure the default page type and metadata and for the homepage. By clicking <em>Settings</em> / <em>Seamless Schema</em> in the admin page. This is optional since WordPress’ values (page title, description and header image) are used by default. You can also set the Twitter username of your website for the Twitter site cards from here.</p>
<p>If you have Polylang installed, you can set per-language settings.</p>
<p>Authors can fill their Twitter username in their profile for the Twitter site cards.</p>
<h3>How to use</h3>
<p>When editing a blog post, a page or an attachment, you can set its Schema.org content type and metadata. In most cases, the content-type will be <em>Article</em> or <em>Web Page</em> but you can set a more accurate type such as <em>Organization</em> or <em>Product Review</em>.</p>
<p>You can add extra metadata and override the default ones such as the name, description (post excerpt) and image by selecting the property you want in the select box then click the + button. The properties that already have a default value show up in italic in the list. If you set an invalid property for the selected content type, the row will show up in red and won’t be used on the website.</p>
<p>The metadata is added in meta tags in the page header so it’s totally invisible. However, only canonical properties can be added. For more complex types such as home address and product review, you have to add manually the metadata in the HTML code of your post. Have a look at the Schema.org website for more information about the structure.</p>
<p>Additional OpenGraph and Twitter tags can be added in posts, pages and attachments as custom fields prefixed by <code>og_</code> or <code>twitter_</code>. For example, to add the tag <code>og:my_tag</code>, add a custom field named <code>og_og:my_tag</code> with the value you want.</p>


Seamless Schema

Seamlessly insert schema.org and Open Graph microdata into WordPress.

Sven

<p><a href="http://omaxis.de/wordpress-plugins/wp-open-graph-meta/" title="Deutsche Beschreibung von WP Open Graph Meta" rel="nofollow ugc">Zur deutschen Beschreibung des Plugins</a></p>
<p>This plugin adds several Open Graph Meta Elements to the header of your theme for blog posts and pages to avoid no thumbnail, wrong title / description issue etc. It is compatible with the WordPress SEO plugins “wpSEO” and “All in One SEO Pack”. When a title or description is stored by one of these SEO plugins, WP Open Graph Meta will use them.</p>
<p>The Open Graph protocol enables any web page to become a rich object in a social graph. For instance, this is used on Facebook to allow any web page to have the same functionality as any other object on Facebook.</p>
<p>To turn your posts and pages into graph objects, the plugin adds the following meta elements to webpage header:</p>
<h4>For post/page</h4>
<ul>
<li>og:title – The title of your post/page (compatible with “wpSEO” and “All in One SEO Pack”)</li>
<li>og:type – The type of your post/page. Depending on the type it is possible to specify automatically other properties.</li>
<li>og:url – The canonical URL of your post/page</li>
<li>og:description – The excerpt of your post/page (compatible with “wpSEO” and “All in One SEO Pack”)</li>
<li>og:site_name – The title of website.</li>
<li>og:locale – The locale these tags are marked up in.</li>
<li>og:image – An image URL (featured image if exists) which should represent your post/page</li>
</ul>
<h4>For post only</h4>
<ul>
<li>article:tag – Tag words associated with your post.</li>
</ul>
<p>Plugin support page: <a href="http://omaxis.de/wordpress-plugins/wp-open-graph-meta/" title="omaxis - online marketing expertise" rel="nofollow ugc">omaxis.de</a></p>
<h3>Languages</h3>
<p>WP Open Graph Meta is language independent.</p>


WP Open Graph Meta

Adds Facebook Open Graph Meta Elements to blog posts/pages to avoid no thumbnail, wrong title/description issue etc.

Seamless Schema vs WP Open Graph Meta