schema.org product availability tags markup
问题 Which one is correct? <link itemprop="availability" href="http://schema.org/InStock"> <meta itemprop="availability" content="InStock" /> <span itemprop="availability" content="in_stock"></span> I checked official schema documentation and in examples found all of them. I suppose all of them will work, but at the moment, is there any preferred standard? 回答1: Using span with the content attribute is invalid . Neither HTML5 nor Microdata allow the content attribute for span. Using meta is