What is a Domain Value?

What is a Domain Value?

• A. A set of valid values determined by rules
• B. A range of values derived from user input
• C. A unique identifier for data entries
• D. A definition of data quality metrics

Answer: (A)

A domain value refers to a set of valid values that are established based on specific rules or constraints for a particular data attribute. These valid values help maintain data integrity by ensuring that data entries conform to predefined standards. For example, if a domain is defined for a field storing country names, valid entries may include only recognized country names, thereby eliminating the possibility of incorrect or nonsensical data. This concept reinforces data validation and consistency within databases. The other options do not align with the specific definition of a domain value. A range of values derived from user input focuses on the variability of data without the constraints that define domain values. A unique identifier pertains to specific data entries but does not capture the essence of valid value sets. Lastly, a definition of data quality metrics refers more broadly to the standards and measures applied to evaluate the quality of data rather than the specific valid values for a domain. Thus, the understanding of domain values is fundamental in ensuring data quality and consistency within data management practices.

A domain value refers to a set of valid values that are established based on specific rules or constraints for a particular data attribute. These valid values help maintain data integrity by ensuring that data entries conform to predefined standards. For example, if a domain is defined for a field storing country names, valid entries may include only recognized country names, thereby eliminating the possibility of incorrect or nonsensical data. This concept reinforces data validation and consistency within databases.

The other options do not align with the specific definition of a domain value. A range of values derived from user input focuses on the variability of data without the constraints that define domain values. A unique identifier pertains to specific data entries but does not capture the essence of valid value sets. Lastly, a definition of data quality metrics refers more broadly to the standards and measures applied to evaluate the quality of data rather than the specific valid values for a domain. Thus, the understanding of domain values is fundamental in ensuring data quality and consistency within data management practices.