On the Database Item Types tab, you can modify the properties that have been assigned to items. For example, you can change the display name of a property or change the category it is associated with in the categorized display of the Properties window. Additionally, these tables are where you view or modify the Read/Write aspect of a property.
From the Database Item Types table, you can see if an item type is subject to a validation or calculation program, or you can apply a program to an item type.
When modifying item type properties, use the Modify <Item Type> Properties dialog box accessed from the Database Item Types display to change Display Name, Category, and Permissions. Use the Modify Property dialog box on the Database Tables tab to change all other editable properties.