When attributes have value combinations, a catalog lets users select a combination from a list, defining all feature attributes at once.
For example, a "Cables" layer catalog might offer combinations like:
•Type A Cable:Voltage=120V, Conductor=Copper, Gauge=12 AWG
•Type B Cable:Voltage=240V, Conductor=Aluminum, Gauge=10 AWG

The catalog editor has two parts:
•Left: Catalog properties, attributes, and value combinations
•Right: Property dialog based on the selection
Define catalog properties:
•Name: Catalog name (referenced in schema definition)
•Recent count: Number of last selected entries listed at the top for fast access
•Sort Mode: Combination sort method
•Sort direction: Sorted combination direction
To add and manage columns:
1.Select Add Column to add a catalog column (appears at the right end).
2.Click the pen icon to open column properties.
3.Click the trash icon to delete a column.
To add and manage combinations:
1.Select Add Combination to create a new combination.
2.Specify column values, Enabled status, retired status, and description.
3.Click the trash icon in the last column to delete a combination.
Selecting a column displays its properties.
A column is a layer attribute. Properties match field properties in the schema editor. The name should match a layer attribute. Specify properties to define the catalog column appearance.
Catalog columns are always read-only. Changing the Readonly flag has no effect.