. . "An entity has different properties, here defined as attributes. [0207] An example of an entity is a specific car offered for sale, e.g. a Porsche, and attributes may be color, e.g. black, engine, e.g. 3.0 liters, etc. [0208] Another example of an entity is a specific boat described by a number of suitable boat-describing parameters, or attributes, such as length, price, year, etc. [0209] When read" . .