![]() ![]() "Massively multiplayer online role-playing game (MMORPG) mixes the genres of role-playing video games and Massively multiplayer online games, possibly in the form of web browser-based games, in which a very large number of players interact with one another within a virtual world.Īs in all RPGs, players assume the role of a character (often in a fantasy world or science-fiction world) and take control over many of that character's actions. This sample Chen's ER-diagram illustrates the structure of a typical MMORP game. ![]() If an entity set participates in a relationship set, they are connected with a line.Īttributes are drawn as ovals and are connected with a line to exactly one entity or relationship set." "In software engineering, an entity–relationship model (ER model) is a data model for describing a database in an abstract way.Chen's notation for entity–relationship modeling uses rectangles to represent entity sets, and diamonds to represent relationships appropriate for first-class objects: they can have attributes and relationships of their own. ![]()
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