A  Conceptual Entity is the representation of any tangible or intanglible resource or state of such resource that is of interest to understand the enterprises, its data, resources and activities.

A  Conceptual Entity is either a Concept or a State Concept.

Example:

- "Person" is a  Conceptual Entity of type Concept, Its temporal boundaries are is birth and its death (see Event Concept).

- "Employee" is a  Conceptual Entity of type State Concept: it is a state of a "person". Its temporal boundaries are its hiring and its departure.