Do I have to create new visible elements to abide by Google's Microdata Schema.org requirements?
I have added Schema.org/Microdata properties to a list component on my site: // This is one item in my list: <div itemscope itemtype = "http://schema.org/WebApplication" > <span itemprop = "name"> The Awesome Web App 01 </span> <span itemprop = "locationCreated" itemscope itemtype = "http://schema.org/City" > <span itemprop = "name"> Chicago </span> </span> </div> When I run that through the google Structured Data Testing Tool I get error: Two of operatingSystem, aggregateRating, applicationCategory, offers are required. So I have a few questions: 1 - Does it matter that I have this error ?