It would be nice if the testing tool actually validated the Schema.org
metadata though. It seems to only really test for valid Microdata and
not about Schema.org compliance at all.
For instance an itemprop of "myimageprop" is located by the Rich Snip
Test tool and the reference correct:
...
myimageprop = Item( 3 )
...
Item 3
Type:
http://schema.org/imageobject
but that should fail as the prop is not going to be something that
Google would know about. I understand that they are allowing extension
but if the tool is to help us prepare for the future where Google
might parse and use our metadata, when we put it in their specified
format, it would be helpful if it showed us that this was indeed not
in their format or that this particular property would be unknown to
them.
Eagerly awaiting some Schema.org validation tools or services.