In networked and distributed simulation, an enumeration is a means of identifying the type of an entity. In the Distributed Interactive Simulation standards the enumeration consists of seven fields: kind - The kind of the entity. Examples are platform, munition, lifeform, environment. domain - The domain in which the entity operates. Examples are land, air, surface. country - The country that the design of the entity can be attributed to. Examples are US, UK, CIS. category - The main category that describes the entity. Examples are tank, fighter, carrier. sub-category - The particular sub-category that this entity belongs to based upon the value of the category field. Examples are M1 Abrams, Tornado, Modified Kiev Class. specific - Specific information about the entity based upon the sub-category field. Examples are M1A1 Abrams, Tornado Mk 3, Admiral Gorshkov. extra - Additional information to specify a particular entity. See also Distributed Interactive Simulation, Model Map.