Google search - domain rating

Just noticed something I haven't seen before: a rating under one of Google search results. It looks like this:



Note, that this isn't local search - it was a very general search that is not related to any specific place. I.e. its not the rating pulled out from Google places.

Any idea where its taken from?

That is called microformat/microdata/RDF. It is not a domain rating.

The snapshot is highlighting result for review website...

Real time visitors comment and give their reviews different hotels and their hospitality.
These starts are user's rating and 4 reviews number of reviews by the users.