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In this sharing debugger result, I notice some strange properties:

  • ia:markup_url
  • ia:markup_url_dev
  • ia:rules_url
  • ia:rules_url_dev

There is no documentation in The Open Graph protocol. What are they for?

1 Answer 1

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A quick Google search shows me that those are related to Facebook Instant Articles.

It looks like the functionality/service is no longer available as of April 2023. Maybe the debugger is still leveraging the meta tags for other services...

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  • What's the keyword you use to Google? I can't figure out one
    – Ooker
    Commented Jan 29 at 10:18
  • I just searched for ia:markup_url and it came up with some documentation. Then I just quickly skimmed some of them to be sure. Commented Jan 29 at 13:42
  • Weird. I did the same but the result was just code from other projects. None of them referred to anything useful
    – Ooker
    Commented Jan 29 at 14:15

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