No two attributes of the same entity type should have the same name.

More Questions from Modeling Data in the Organization

• A derived attribute is an attribute whose values can be calculated from a related relationship.
• A strong entity is an entity whose existence depends on some other entity type.
• A fact is a word or phrase that has a specific meaning for the business.
• Some business rules cannot be represented in common data modeling notation.
• A time stamp is a time value that is associated with a data value.
• An attribute is a person, place, object, event in a user environment.
• Business rules and policies are universal.
• A logical representation of the data for an organization or for a business area is known as an entity-relationship model.
• Relationships cannot have attributes.

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