You can populate the contents of a drop-down list characteristic in three ways:
Static Values: Enables you to populate the drop-down list with a group of values that do not change. See "Populating a Drop-Down list with Static Values" for more information.
Entity Link: Enables you to populate the drop-down list with the names of all entities created from the selected specification. See "Populating Drop-Down Lists with Entity Links Using Existing Specifications" and "Populating Drop-Down Lists with Entity Links Using New Specifications" for more information.
Query: Enables you to populate the drop-down list with the results of a query that you define. See "Populating Drop-Down Lists with Query Results" for more information.
Note:
See "Overriding Values for Drop Down List Characteristics" for information about defining values for drop down lists at the Specification editor level.