ER MODELING Essence, Attribute, Relationship "A player with a unique name and level participates in matches and buys items with gold." Essence An object in the domain about which data must be stored. In the description text, this is a noun: player, match, item. Attribute A property of an entity: nickname, level, price. It answers the question “What do we know about it?” Relationship A relationship between entities. In the text, this is a verb: a player buys an item, a player participates in a match. nouns entities → tables verbs relationships → foreign keys Attributes attributes → columns