WPSSO SSM – Remove Duplicate HTML Meta Tags

The WordPress Strip Schema Microdata (WPSSO SSM) v1.1.0-1 extension has been released (see the complete Changelog here) — this new version adds a “Strip Microdata” settings page to the SSO menu and allows you to enable / disable the removal of specific markup from the head and body sections, including the removal of duplicate / conflicting meta tags in the head section (disabled by default).

The WPSSO SSM filters are very fast – generally running in under 0.003 seconds – and enabling the removal of duplicate meta tags won’t add much to this, but I would suggest not enabling that feature unless you need it. If your theme and/or other plugins are adding duplicate meta tags, it’s always best to disable them at their source instead of filtering them out afterwards – but if that’s not possible, then I’m sure you’ll love this new WPSSO SSM feature. ;-)

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NGFB / WPSSO – What are “Meta Property Containers”?

The NextGEN Facebook (NGFB) and WPSSO plugins offer a “Meta Property Containers” option that you can enable / disable under their General Settings > Specific Websites and Publishers > Google / Schema tab. There are several ways to include Schema markup in webpages (see an Introduction to Structured Data from Google for examples):

  • JSON-LD machine-readable scripts for Google (see WPSSO JSON extension).
  • Microdata and RDFa markup of HTML tag attributes in theme templates (not recommended).
  • HTML meta tags in the webpage head section.

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