Entity definition - What it is, Meaning and Concept

Of the medieval Latin entitas , entity is any collective that can be considered as a unit .The concept is often used to name a corporation or company that is taken as a legal entity .

For example: "The Buenos Aires entity declared bankruptcy because it could not assume its financial obligations" , "I work for a renowned entity that has a presence in fourteen countries of our continent" , "The American player became the new signing of the black and white entity" , “Hard accusation against the entity chaired by John Smith” .

The term, on the other hand, makes it possible to refer to certain territorial divisions within a State.A subnational entity can be a province, a community or a region, among others rankings: the provinces of the Argentine Republic , the autonomous communities of Spain , the cantons of Switzerland , the communes of Chile , the departments of Bolivia , the prefectures of Japon , etc.

Entity is also the value or importance of something .In this regard, when a thing has an entity, it has a particular relevance: "The accusation of the minister has no entity and will soon be forgotten" , "The word of Dr.Filimenti has an entity within medicine provincial and must be heard ”, “ No I will comment on sayings without an entity that only confuse the population ”.

For philosophy , the entity is what constitutes the essence of a thing .In a broader sense, an entity or an entity is something whose existence is recognized by an ontological system.There are concrete entities (such as people or material objects) and abstract entities (properties, possibilities, thoughts).

In informatics, more specifically in object-oriented programming, entity can be defined as a class that has the basic properties of a series of classes that happen .Through inheritance, different classes you can take advantage of the properties and methods of the same mother class; Depending on the structure proposed by each developer and the characteristics of each language, it is also possible to take the elements of the main class as the basis for the creation of others, generally more complex or specific.

It is very common use an entity class to declare properties such as position variables in space, with their respective methods get (to get their values) and set (to store new values ​​in them), which will serve as a basis for a large number of objects.In the context of a video game, for example, both an object of type enemy and another of type main character They can use the same entity class, although both require their own classes for the definition of their particular methods and properties.

In the field of databases, the representation that is made of a concept or of a real-world object in the database itself is known as an entity.Any entity must be described in the structure of the database (the set of tables and fields with their respective types of data, their relationships and restrictions, such as the rules to preserve the integrity of the data or to avoid its redundancy), following a certain model (a set of concepts used to describe the structure).

If you take as an example a service company, you can say that one of the entities in your database will surely be Client , which, in turn, will consist of a series of attributes , such as name , last name , phone number and email address .At the same time, okay With the entity-relationship model, it is possible to distinguish between strong entities (those that have key attributes) and weak ones (which depend on the key attributes of the former).