[{Image src='attach/ERD/ERD_Transferable.JPG' width='323' align='right' link='attach/ERD/ERD_Transferable.JPG'}] Non Transferable is a property of a [foreign key|FOREIGN KEY] link where the link cannot be changed from one parent table record to another. On Entity Relationship Diagrams, this is shown as a diamond symbol on the link. In the example above, the Alias record cannot be altered to point to a different Identity. That is, the alias is for one person and cannot be switched to another person. This is managed by a BEFORE UPDATE [data base trigger|DATA BASE TRIGGER] ---- ![Notes|Edit:Internal.NON-TRANSFERABLE] [{InsertPage page='Internal.NON-TRANSFERABLE' default='Click to create a new notes page'}]