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I have trouble understanding the exact definition of an "entity". My gut somehow knows what an entity is. However, I referred to two definitions. The ISO/IEC 24760-1:2019 Standard states:

3.1.1 entity item relevant for the purpose of operation of a domain (3.2.3) that has recognizably distinct existence.

Note 1 to entry: An entity can have a physical or a logical embodiment. EXAMPLE A person, an organization, a device, a group of such items, a human subscriber to a telecom service, a SIM card, a passport, a network interface card, a software application, a service or a website.

or from the ITU-T X.1252

6.34 entity: Something that has separate and distinct existence and that can be identified in context.

What is meant by context/domain? How would the notion of an entity change if we left the context/domain part out of the definition

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  • Do you want to know what "entity" is or how context/domain applies? And how do these definitions not answer you? I'm thinking this is an English question, not a security question.
    – schroeder ♦
    Commented Sep 5 at 17:03
  • It might be a language question. However the main question is why an entity needs a context / domain for existing.
    – Derawi
    Commented Sep 5 at 17:33
  • does some entity have a unique identifier compared to the other entities that are of the same type? could the value given to that particular identifier be duplicated if the entity was of a different type?
    – brynk
    Commented Sep 5 at 18:05
  • Why it needs context is not a security question, but a philosophical/linguistic question. Things exist in context. You exist in context. Your identity exists in context. As a child of your parents, as a user of this site, as a student of this subject.
    – schroeder ♦
    Commented Sep 5 at 18:43

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