Re: why Vehicle subClassOf Product ? (also: Commercial, Economic)

Dave,

If its just a book...its Subject and Thing:about can be pointed to:

http://id.loc.gov/authorities/subjects/sh85067314.html

or even one of the broader terms you find on that page.  (or use the
alternative formats, if need be)

and the Search Engine concept is here:
http://id.loc.gov/authorities/subjects/sh00001050.html

and the Database Engine concept is here:
http://id.loc.gov/authorities/subjects/sh86000622.html

Use SKOS Concepts when you want to describe further... your not limited to
only Schema.org Types....and just use <link href=> when you need to
describe further... external enumerations are described here:
http://blog.schema.org/2012/05/schemaorg-markup-for-external-lists.html

Thad
+ThadGuidry <https://www.google.com/+ThadGuidry>