Which of the following is NOT a way in which domains can be defined?

Which of the following is NOT a way in which domains can be defined?

• A. Range
• B. Value-based
• C. List
• D. Rule-based

Answer: (B)

Defining domains in data management involves specifying allowable values for a particular attribute or field. Each method of domain definition contributes to structuring data, ensuring consistency, and enforcing data integrity. The method labeled as value-based typically refers to defining domains based on specific data values or entries that an attribute can hold. While value-based definitions might imply that a set of values is permissible, it does not encompass the broader definition mechanisms available for defining domains. On the other hand, the other methods of defining domains—such as range, list, and rule-based—provide clear frameworks for how data types are restricted. Range sets boundaries for numerical or date values, a list provides a predefined collection of acceptable entries, and rule-based definitions utilize logical conditions to determine valid data entries. Each of these contributes to a more comprehensive approach to domain specification compared to a value-based definition, which is more limited in scope.

Defining domains in data management involves specifying allowable values for a particular attribute or field. Each method of domain definition contributes to structuring data, ensuring consistency, and enforcing data integrity.

The method labeled as value-based typically refers to defining domains based on specific data values or entries that an attribute can hold. While value-based definitions might imply that a set of values is permissible, it does not encompass the broader definition mechanisms available for defining domains.

On the other hand, the other methods of defining domains—such as range, list, and rule-based—provide clear frameworks for how data types are restricted. Range sets boundaries for numerical or date values, a list provides a predefined collection of acceptable entries, and rule-based definitions utilize logical conditions to determine valid data entries. Each of these contributes to a more comprehensive approach to domain specification compared to a value-based definition, which is more limited in scope.