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In law, a legal entity is an entity that is capable of bearing legal rights and obligations, such as a natural person or an artificial person (e.g. business entity or a corporate entity). In politics, entity is used as term for territorial divisions of some countries (e.g. Bosnia and Herzegovina).
In software development, an object is an entity that has state, behavior, and identity. [1]: 78 An object can model some part of reality or can be an invention of the design process whose collaborations with other such objects serve as the mechanisms that provide some higher-level behavior. Put another way, an object represents an individual ...
An entity, strictly speaking, is an instance of a given entity-type. There are usually many instances of an entity-type. Because the term entity-type is somewhat cumbersome, most people tend to use the term entity as a synonym. Entities can be thought of as nouns. [7] Examples include a computer, an employee, a song, or a mathematical theorem.
Meyer described the Eiffel software development method, based on a small number of key ideas from software engineering and computer science, in Object-Oriented Software Construction. [18] Essential to the quality focus of Eiffel is Meyer's reliability mechanism, design by contract , which is an integral part of both the method and language.
Object–relational mapping (ORM, O/RM, and O/R mapping tool) in computer science is a programming technique for converting data between a relational database and the memory (usually the heap) of an object-oriented programming language.
Phase one – entity definition The objective of the entity definition phase is to identify and define the entities that fall within the problem domain being modeled. Phase two – relationship definition The objective of the relationship definition phase is to identify and define the basic relationships between entities.
If a data model is poorly crafted, even a computer applications system with just a million records will give the end-users unacceptable response time delays. For this reason, data modeling is a keystone in the skills needed by a modern software developer.
A business object is an entity within a multi-tiered software application that works in conjunction with the data access and business logic layers to transport data. [ citation needed ] Business objects separate state from behaviour because they are communicated across the tiers in a multi-tiered system, while the real work of the application ...