Through the process of trying to figure out how I could track the performance of semantic markup, I discovered that I could use Google Tag Manager coupled with a dataLayer and dynamic tags to push out JSON-LD structured data/markup at scale.
Check out, 7 Steps to Pushing Out JSON-LD Structured Data using Google Tag Manager, to learn how I'm delivering structured data to Google without having to actually add microdata markup to my pages' code. We can also use this method to more elegantly enable the type of Semantic Analytics I first described in my post (http://moz.com/blog/semantic-analytics).
If you're at #SMX this week, I'll be doing an in-depth session on this tomorrow at 9am. Join me!