When I check the Add OpenGraph Meta Data it automatically adds an entry which W3C is saying is invalid markup.
<meta property='og:locale' content='en_US'/>
My site is XHTML 1.0 Transitional and the others og:description, og:title are ok.
Anybody has a solution to this other than unchecking the box and manually adding OpenGraph meta data?
- The topic ‘[Plugin: WordPress SEO by Yoast] Adding opengraph meta data makes header W3C Invalid’ is closed to new replies.