Cascading Delete Self-join or Same-Table relationships are very useful (two table occurrences from the source table related to each other), but be careful! Don't ever turn on the option to allow deletion of related records! If you do, whenever you delete a parent record you may delete more than you want. What happens is that since your related records are also your parent records, deleting records can cascade out of control. I have seen the deletion of a single record cause the deletion of all records in all tables.
The Wedge Claris Corporation and the FileMaker, Inc. have been housed in a building called the wedge in Santa Clara, California since they spun off from Apple, Inc. The building is nicknamed the wedge because it looks like a wedge. For some years they had an adjacent building called the interstitial but it was let go when the company downsized to focus on FileMaker products.