We need a feature that can update Dynamic Domains automatically based on the value of a specific field in another feature class. This feature will allow the user to choose which field they want to use as the display field for the Dynamic Domains. For example, if the user has a feature class of cities and another feature class of countries, they can use the country name field as the display field for the Dynamic Domains of the cities, based on the country field.
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Another Suggestion
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When the user creates a relationship class between two feature classes, they should be able to select a field from the origin feature class that will be displayed on the destination feature class, instead of the foreign key data. For example, if the user has a relationship class between cities and countries, they can use the country name field as the display field for the cities, based on the fk_CountryID field. The user should also be able to choose the value of the display field from a drop-down list with a filter, similar to how domains work. This will help the user avoid typing errors and make the relationship class more efficient and user-friendly. This feature will also encourage the GEO DB users to use the relationship class functionality more often.