Title: Structured data errors
Last modified: February 28, 2017

---

# Structured data errors

 *  [girish.tiwari](https://wordpress.org/support/users/girishtiwari/)
 * (@girishtiwari)
 * [9 years, 3 months ago](https://wordpress.org/support/topic/structured-data-errors-9/)
 * We are getting a lot of structured data error. I am highlighting the error below.
    1.  Blog is not a known valid target type for the mainContentOfPage property.
        
       author-A value for the author field is required. image- A value for the image
       field is required. publisher – A value for the publisher field is required. 
       dateModified- The dateModified field is recommended. Please provide a value 
       if available. mainEntityOfPage – The mainEntityOfPage field is recommended. 
       Please provide a value if available. blogPost

Viewing 5 replies - 1 through 5 (of 5 total)

 *  [Fotis](https://wordpress.org/support/users/markwaregr/)
 * (@markwaregr)
 * [9 years, 3 months ago](https://wordpress.org/support/topic/structured-data-errors-9/#post-8856178)
 * Hi there,
    please have a look here [https://wordpress.org/support/topic/found-error-using-structured-data-testing-tool/](https://wordpress.org/support/topic/found-error-using-structured-data-testing-tool/)
 * You can have also a look at this post [http://fivera.net/hatom-feed-hatom-entry-error-wordpress-solution/](http://fivera.net/hatom-feed-hatom-entry-error-wordpress-solution/)
   for more info.
    and start making the changes in the single.php ,content-entry.
   php,content-entry-widget.php and index.php files.
 *  Thread Starter [girish.tiwari](https://wordpress.org/support/users/girishtiwari/)
 * (@girishtiwari)
 * [9 years, 3 months ago](https://wordpress.org/support/topic/structured-data-errors-9/#post-8856263)
 * Hi,
 * So, when you are going to fix and release a new version of theme? That post was
   updated 9 months ago
 *  [Fotis](https://wordpress.org/support/users/markwaregr/)
 * (@markwaregr)
 * [9 years, 3 months ago](https://wordpress.org/support/topic/structured-data-errors-9/#post-8858293)
 * Hi there,
    microformats are probably not going to be implemented in the near 
   future. Please check my previous suggestion and let me know if you get stuck 
   somewhere
 *  Thread Starter [girish.tiwari](https://wordpress.org/support/users/girishtiwari/)
 * (@girishtiwari)
 * [9 years, 3 months ago](https://wordpress.org/support/topic/structured-data-errors-9/#post-8859888)
 * Hi,
 * The errors we are getting are not mentioned in the blog post you shared. E.g.
 * > Blog is not a known valid target type for the mainContentOfPage property.
 *  [Fotis](https://wordpress.org/support/users/markwaregr/)
 * (@markwaregr)
 * [9 years, 3 months ago](https://wordpress.org/support/topic/structured-data-errors-9/#post-8860849)
 * Hi there,
    remove `itemprop="mainContentOfPage"` from files index.php, 404.php,
   page.php,single.php, template-fullwidth.php and let me know if the issue persists

Viewing 5 replies - 1 through 5 (of 5 total)

The topic ‘Structured data errors’ is closed to new replies.

 * ![](https://i0.wp.com/themes.svn.wordpress.org/olsen-light/1.7.1/screenshot.png)
 * Olsen Light
 * [Support Threads](https://wordpress.org/support/theme/olsen-light/)
 * [Active Topics](https://wordpress.org/support/theme/olsen-light/active/)
 * [Unresolved Topics](https://wordpress.org/support/theme/olsen-light/unresolved/)
 * [Reviews](https://wordpress.org/support/theme/olsen-light/reviews/)

 * 5 replies
 * 2 participants
 * Last reply from: [Fotis](https://wordpress.org/support/users/markwaregr/)
 * Last activity: [9 years, 3 months ago](https://wordpress.org/support/topic/structured-data-errors-9/#post-8860849)
 * Status: not resolved