From Wiki of the E-Business and Web Science Research Group

GoodRelations is a standardized vocabulary for product, price, and company data that can be embedded into existing static and dynamic Web pages.
Project Main Page Vocabulary Documentation Developer's Wiki GoodRelations Cookbook

The Review Ontology can be used to attach reviews to

• gr:BusinessEntity
• gr:ProductOrServiceModel
• gr:LocationOfSalesOrServiceProvisioning

and other GoodRelations elements. Yahoo will show respective review data directly in the search results.

On this page, we will give examples for using the Review Ontology in combination with GoodRelations.

Materials

http://vocab.org/review/terms.html