I have a HTML5 based page, and I inculded the OpenGraph tags according to it's documentation. Also I checked with Facebook Debug, and it can parse the metadata.But when I use W3C Validator, it reports the OG tags as error:Attribute content not allowed on element meta at this point.<meta property=fb:admins content=.... />Attribute content not allowed on element meta at this point.<meta property=og:url content=http://www....>They are all in the <head>.I would need my page be valid HTML5 and OG tags, as well. Could you help me giving a hint how can it be achieved?UPDATE:The name version also invalid: <meta name='fb:admins' content=''>
OpenGraph tags and HTML5 validity
facebook;html5;validation;facebook graph