Which term refers specifically to the allowed types within an attribute field in GIS?

The term that specifically refers to the allowed types within an attribute field in GIS is known as "Attribute Domain." In GIS, an attribute domain defines the set of permissible values that can be assigned to a specific attribute within a dataset. This ensures data integrity and consistency by restricting the input to predefined valid values, such as type, range, or specific values.

For example, if the attribute field is "Land Use," the domain might include values like "Residential," "Commercial," "Industrial," etc. This helps GIS users avoid errors during data entry and ensures that analyses based on these values are accurate and meaningful.

While concepts like "Field Types," "Attribute Range," and "Value Types" might relate to data management in GIS, they do not specifically encapsulate the notion of allowed types in the same way that "Attribute Domain" does. Field types typically refer to the general format of the data (e.g., integer, text), while attribute range indicates a numerical limit. Value types might address the nature of the data without specifying the constraints set by domains. Thus, "Attribute Domain" is the most precise term for defining allowable values within an attribute field.