A DB table browser I found was always helpful in figuring out relationships. Once you browsed enough of them you see a strong pattern in their generation. IDA2A2 is a row ID. If there is a link to a specific item, iteration, etc, the link table will refer to this number mainly. Exception would be for version links. You'll notice links to other tables in the form of IDA...something something (ex: IDA3B5 or IDA3B3). Right next to that column is typically a class name with a similar column heading. That indicates what table the IDA... column adjacent is linked to. You can search for that column and look for the IDA2A2 that matches there linked reference. There is also strong correlation in URLS to table names or something similar. Not always and everything but without a rational rose model, it should not take long with Toad or SQL Developer to go hunting and find what you need.
