Entity is a thing with distinct and independent existence such as a Natural Person, Organization, concept, or device.

You will undoubtedly find many definitions for Entity. Ldapwiki has tried to put some we have discovered and are appropriate for our context

Entity may also have a Digital Identity, Application, data, etc.

Entity is a resource of any kind that can be uniquely and independently identified.

Entity is something that exists as itself, as a subject or as an object, actually or potentially, concretely or abstractly, physically or not. An Entity need not be of material existence. In particular, abstractions and Legal Fictions are usually regarded as entities. In general, there is also no presumption that an Entity is animate, or present.[1]

Entity will have some type of Identifier

The National Strategy for Trusted Identities in Cyberspace (NSTIC) defines some terms similar to those defined here:

  • "An individual is a person engaged in an online transaction. Individuals are the first priority of the Strategy."
  • "A non-person entity (NPE) may also require authentication in the Identity Ecosystem. NPEs can be organizations, hardware, networks, software, or services and are treated much like individuals within the Identity Ecosystem. NPEs may engage in or support a transaction."
  • "The subject of a transaction may be an individual or an NPE."

Some examples:

Entity is defined in ISO 29115 as "Something that has separate and distinct existence and that can be identified in a Context"

Domain-Driven Design#

Entity is an object that is not defined by its attributes, but rather by a thread of continuity and its identity.

Domain-Driven Design Entity Example:

  • Most airlines distinguish each seat uniquely on every flight. Each seat is an Entity in this Context.
  • However, Southwest Airlines, EasyJet and Ryanair do not distinguish between every seat; all seats are the same. In this Context, a seat is actually a Value Object.

More Information#

There might be more information for this subject on one of the following: