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Seamless Schema


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.


Configure the default page type and metadata and for the homepage. By clicking Settings / Seamless Schema 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.

If you have Polylang installed, you can set per-language settings.

Authors can fill their Twitter username in their profile for the Twitter site cards.

How to use

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 Article or Web Page but you can set a more accurate type such as Organization or Product Review.

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.

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.

Additional OpenGraph and Twitter tags can be added in posts, pages and attachments as custom fields prefixed by og_ or twitter_. For example, to add the tag og:my_tag, add a custom field named og_og:my_tag with the value you want.


  • The Schema.org metadata editor


  1. Download and unzip seamless-schema archive contents to the /wp-content/plugins/seamless-schema directory or add it using WordPress’ plugin manager.
  2. Activate the plugin through the ‘Plugins’ menu in WordPress
  3. It works!


How can I validate the Schema.org metadata of my web page ?

For Schema.org metadata, go to http://www.google.com/webmasters/tools/richsnippets

For OpenGraph metadata, go to https://developers.facebook.com/tools/debug/

For Twitter site cards, go to https://cards-dev.twitter.com/validator

I have Schema.org validation errors. What can I do?

Your theme may already have its own Schema.org implementation that causes issues. Try with another theme or disable Seamless Schema.


3 septembris, 2016
This plugin works but it leaves the schema code behind after deactivation and removal. i think plugin authors need to clean up after them ie, when a plugin is removed, it should be coded properly to remove all code so there are no other conflicts with future plugin installs. Plugins that leave code behind are unacceptable and lazy work. If you choose to install this plugin, remember that code will be left behind even after plugin deletion!
3 septembris, 2016
I really like that the drop-down list contains all of the options for schema markup. I find that other plugins (although perhaps more user-friendly) have a very limited amount of schema mark-up, so unless you own a food blog you’re fucked. With a bit of research on the Schema website this plugin speeds up the process a lot and is very flexible. Highly recommended for podcasters.
Lasīt 7 atsauksmes

Autori un izstrādātāji

“Seamless Schema” ir atvērtā pirmkoda programmatūra. Šo spraudni ir veidojuši šādi cilvēki.


Tulkot “Seamless Schema&#8221 savā valodā.

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Izmaiņu žurnāls


  • Added support for Facebook admins (fb:admins) and Facebook application ID (fb:app_id) meta tags.
  • Thumbnail image sizes have been optimized to match Facebook’s and Twitter’s requirements and provide maximum visibility:
    ** The “thumbnailUrl” Schema.org property and the Twitter site card image now use the large version of the featured image, instead of the medium one.
    ** The “image” Schema.org property and the Open Graph image now use the featured image at its full size, instead of the medium one.


  • Added Twitter site cards support
  • Minor bugfixes


  • First public release