This plugin hasn’t been updated in over 2 years. It may no longer be maintained or supported and may have compatibility issues when used with more recent versions of WordPress.

AddThis xmlns


This plugin adds the xmlns:addthis=”” entry to the HTML tag. This head entry is required to make it Valid XHTML. More info at


  • Screenshot of the HTML tag which now includes the xmlns:addthis entry!


This section describes how to install the plugin and get it working.

  1. Delete any existing ‘mjd-addthis-xmlns’ folder from the ‘/wp-content/plugins/’ directory.
  2. Upload the ‘mjd-addthis-xmlns’ folder to the ‘/wp-content/plugins/’ directory.
  3. Activate the plugin through the ‘Plugins’ menu in WordPress.


Why do I need this plugin?

If you are using the AddThis bookmarking plugin ( )
then you need this plugin to make sure that the generated HTML by the AddThis plugin is Valid.
The plugin adds the xmlns:addthis=”” entry to the html head tag so that the custom attributes of the AddThis plugin are recognized properly.

Contributors & Developers

“AddThis xmlns” is open source software. The following people have contributed to this plugin.




  • Initial release.