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Entity–relationship model. An entity–attribute-relationship diagram for an MMORPG using Chen's notation. An entity–relationship model (or ER model) describes interrelated things of interest in a specific domain of knowledge. A basic ER model is composed of entity types (which classify the things of interest) and specifies relationships ...
In computer science terms, a property graph is a data structure representing entities associated by directed relationships, where the nodes and relations can both include multiple attributes / properties. In terms of graph theory, a property graph is a directed multigraph , whose vertices /nodes represent the entities of the corresponding data ...
Data structure diagram. A data structure diagram (DSD) is the visual representation of a certain kind of data model that contains entities, their relationships, and the constraints that are placed on them. It is an older alternative to the entity–relationship model. The basic graphic notation elements of DSDs are boxes which represent entities.
A structure chart (SC) in software engineering and organizational theory is a chart which shows the breakdown of a system to its lowest manageable levels. [2] They are used in structured programming to arrange program modules into a tree. Each module is represented by a box, which contains the module's name.
Example of a system context diagram. [1] A system context diagram in engineering is a diagram that defines the boundary between the system, or part of a system, and its environment, showing the entities that interact with it. [2] This diagram is a high level view of a system. It is similar to a block diagram.
Long-term relationship (LT —R) Monogamy – having a single long-term partner or marriage to one person. Polyamory – having multiple long-term lovers and/or partners. Polygamy – marriage to multiple partners. Polyandry – the marriage of a woman to multiple men. Polygyny – the marriage of a man to multiple women.
1. Eros: Sexual Passion. The first kind of love the Greeks defined was eros, named after the Greek god of carnal love and fertility. It represents sexual passion and desire and is the root of the ...
Class diagram - a type of static structure diagram that describes the structure of a system by showing the system's classes, their attributes and the relationships between the classes. Classifier - a category of UML elements that have some common features, such as attributes or methods.