It contains a foreign key

It contains non-atomic attribute values

It contains composite candidate keys

It contains any NULL values

FK contains NULL even though matching PK exists

FK contains multiple values

FK attribute has a different domain than PK

FK value references a PK value not yet inserted

A stored table with fixed attribute values

A named list of attributes representing roles played by domains

A set of data types used in a database

The current set of tuples in a database

A relationship

An entity

A multivalued attribute

An attribute of another entity

It has only one value

It appears as a verb in the description

It has at least one numeric attribute

It is important in its own right

They indicate strictness of domains

They express whether an entity must participate in a relationship

They determine uniqueness of tuples

They define the primary key

A derived attribute

An entity

An attribute

A multivalued attribute

The minimum number of attributes an entity must have

The maximum number of entities participating in a relationship

Data type restrictions on attributes

Whether an attribute must be unique

It appears as a step in a process

It is modeled repeatedly in many ERDs

It has multiple descriptive attributes

It has more than one instance

Derived attribute

Key attribute

Multivalued attribute

Weak entity