1. For example, suppose a simple abstract entity model (part of the traditional analysis model) was developed in UML by a set of analysts.

2. A work list can therefore be considered an abstract entity that does not require modeling.

3. And yet no one would suggest that an unobserved proton is an abstract entity.

4. Definition: A region-like interval with the material nature and a complex structure; an abstract entity of unknown size that can be hardly separated by sentiment, reason, law, and strength.

5. In encapsulation you are concerned with enclosing programming elements (scripts, classes, and so on) inside a larger, more abstract entity (other scripts and classes).