Validator : og:image is not registered

Question

any advice about that?

Bad value og:image for attribute name on element meta: Keyword og:image is not registered.

its not valid markup, see similar question/answer here: http://stackoverflow.com/questions/8338499/html5-validator-failing-on-facebook-opengraph-xml-namespace-xmlnsog/8339047#8339047 — albert, Dec 01 '11 at 13:20
any advice how to pass a share thumbnail? is here other any valid tags? — Dee, Dec 01 '11 at 13:35
idk what you mean by pass a share thumbnail, sorry. other valid markup...in place of og? i'm assuming you're working with facebook, if so, then no, but remember, validation is a tool, use it, but don't live or die by it — albert, Dec 01 '11 at 13:39

score 1 · Answer 1 · edited May 23 '17 at 09:59

It looks like you need to define the XML namespace og.

I would guess you need to change your <html> tag to read

<html xmlns="http://www.w3.org/1999/xhtml"
  xmlns:og="http://ogp.me/ns#"
  xmlns:fb="http://www.facebook.com/2008/fbml">

so that the og prefix is declared. As albert pointed out, you would either need to declare your document as XHTML as described at #8338499: HTML5 validator failing on Facebook OpenGraph XML namespace or you could write them conditionally to the page, so that only the Facebook crawler sees them, as in thejudge's answer to #6501189: OpenGraph validation for HTML5.

1 Answers1