Add constraints or indexes
Constraints and indexes that are part of the database structure are displayed as part of the table, but additional constraints and indexes can be added.
Add foreign keys A foreign key constraint specifies that values in one table must also appear in another table. Foreign keys that are part of the database structure are displayed, but foreign keys can also be added.
Manage SERIALs
See "Auto-incremented columns (serials)" in the BDL User Guide.
Centralize field information (label, widget, default value)
Specifying field properties at the meta-schema level allows you to centralize properties such as the label, widget, and default value used when an application based on the meta-schema is built.