Bugzilla – Bug 891
How to validate meta property tag
Last modified: 2012-01-09 10:52:43 CET
Facebook using <meta property="og:title" content="The Rock"/> You had moved the Facebook.com tags to Proposals that don't meet the requirements for a registration and also done the clean up the page. But as now Facebook, Google, Twitter are becoming the major traffic generators for website and if there meta tags are moved out of valid tag's then how one could validate web page. HTML5 is providing Backwards compatibility and page get validate one with <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01+RDFa 1.0//EN" "http://www.w3.org/MarkUp/DTD/html401-rdfa-1.dtd">. Kindly let me know how to validate the web page with HTML5. Millions of web pages today use Facebook like button and comments and all are invalid, kindly provide some solution to resolve the issue, if it is not already provided....
The 'property' attribute is not part of HTML5. Validator.nu doesn't support a profile that'd extend HTML5 with a 'property' attribute for Facebook. Note that Validator.nu doesn't support reporting Google's <g:plusone> as valid, either, since a 'g:plusone' element is not part of HTML5. It would be nice if Facebook (and G+) kept their script boilerplate within the constraints of the HTML5 spec proper.