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Classes can be derived from one or more existing classes, thereby establishing a hierarchical relationship between the derived-from classes (base classes, parent classes or superclasses) and the derived class (child class or subclass) . The relationship of the derived class to the derived-from classes is commonly known as an is-a relationship. [21]
Class attributes (computer programming), defining the structure of a class; Complexity class, a set of problems of related complexity in computational complexity theory; Java class file, computer file containing Java bytecode; Pseudo-class, cascading style sheet (CSS) construct for defining formatting
A social class or social stratum is a grouping of people into a set of hierarchical social categories, [1] the most common being the working class, middle class, and upper class. Membership of a social class can for example be dependent on education, wealth, occupation, income, and belonging to a particular subculture or social network.
The first definition of class results in ontologies in which a class is a subclass of collection. The second definition of class results in ontologies in which collections and classes are more fundamentally different. Classes may classify individuals, other classes, or a combination of both.
The precise definition of "class" depends on foundational context. In work on Zermelo–Fraenkel set theory, the notion of class is informal, whereas other set theories, such as von Neumann–Bernays–Gödel set theory, axiomatize the notion of "proper class", e.g., as entities that are not members of another entity.
Class stratification is a form of social stratification in which a society is separated into parties whose members have different access to resources and power. An ...
Class analysis is research in sociology, politics and economics from the point of view of the stratification of the society into dynamic classes.It implies that there is no universal or uniform social outlook, rather that there are fundamental conflicts that exist inherent to how society is currently organized.
Class diagram showing generalization between the superclass Person and the two subclasses Student and Professor. The generalization relationship—also known as the inheritance or "is a" relationship—captures the idea of one class, the so-called subclass, being a specialized form of the other (the superclass, super type, or base class). Where ...