Final answer:
A coded value domain provides the benefits of specifying valid values for an attribute and displaying user-friendly descriptions, which help maintain data integrity and ease of use.
Step-by-step explanation:
A coded value domain is commonly used in geospatial databases and Geographic Information Systems (GIS) to manage attribute data. Among its benefits, two stand out particularly:
- A. It specifies valid values for an attribute: By defining a list of acceptable values, a coded value domain ensures that data entries are consistent and adhere to a predefined standard. This can be incredibly useful when dealing with attributes that have a limited set of possible values, such as land use types or status codes.
- C. It displays a user-friendly description: While the data stored may be in the form of codes or numeric values, a coded value domain can provide a readable description for each value. This makes it easier for users who are entering or analyzing data to understand the information without having to memorize codes or refer to external documents.
While a coded value domain does help in ensuring the validity of data for a certain attribute, it does not validate all attributes in a table (as suggested in option D), nor does it store rules for attribute display, which is more related to how data is visualized rather than how it is entered (as suggested in option B).