A review is an opinion of a person about a product or service. A review can be extremely simple: just recording that one has a book, seen a movie, etc is already a review.

Common fields for reviews are:

• title - a short (few words) description of the review;
• rating - an indication of the appreciation of the product. Most often used is a five-point scale, with 1 point the lowest rating and five points the highest rating;
• description - describes the appreciation of the product in words;
• identifier - a unique identification that refers to the product / service. This can be an ISBN, EAN, UPC or ASIN number. Or an address card for a restaurant or a geographic location;
• product uri - a web-page that contains the product;

Note that there is a relation with the Bookmarks and Ratings Type.

Applications that support reviews are DVD Cache.