In an E–R model, what is the term for properties that describe the characteristics of entities?

Introduction / Context:
E–R modeling assigns properties to entities to capture business facts. Knowing the correct term for these descriptive properties is necessary for clear communication and accurate designs.

Given Data / Assumptions:

• Entities are things of interest (for example, Customer, Product).
• We need the term for descriptive properties of those entities (for example, CustomerName, BirthDate).

Concept / Approach:
Attributes are the named properties that hold values for each entity instance. Some attributes, singly or in combination, may be used as identifiers (keys), but the general term for properties is attributes.

Step-by-Step Solution:

Verification / Alternative check:
Any E–R diagram shows entities with lists of attributes inside or near the entity box.

Why Other Options Are Wrong:

• Entities are the things themselves, not their properties.
• Identifiers are specific attributes chosen for uniqueness.
• Relationships describe associations, not properties.

Common Pitfalls:
Using attributes and identifiers interchangeably. All identifiers are attributes, but not all attributes are identifiers.

Final Answer:
attributes