Re: Question on proposed sports vocab extensions for schema.org

My opinion is that Athletes are indeed a sub-type of a Person.

You could look at the problem from a different angle as well.  Your
examples of a horse, robot, etc... would be a different type, such as
"Competitors".

ESPN simply decided to create their own rule of "ALL COMPETITORS ARE
ATHLETES".  Nothing wrong with making their own rules within their own
namespace, "their website, or TV channel".  My rules would say that "ALL
ATHLETES ARE PERSONS" and "ALL COMPETITORS COMPETE IN AN SPORTING EVENT"

-- 
-Thad
http://www.freebase.com/view/en/thad_guidry