Schema.org says this, The opening hours for a business. Opening hours can be specified as a weekly time range, starting with days, then times per day. Multiple days can be listed with commas ',' ...
At the moment i have an embeded youtube video. <iframe class="video" allowfullscreen="" src="http://www.youtube.com/embed/1y8dYlBWOh4?html5=1"> </iframe> as you can see with the ...
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 ...