Everything about your SQL Server database is stored in its system tables. I doubt that you spend a lot of time inspecting the system tables since you are too busy with your user tables. However, you may need to do something unusual once in a while, such as list all the triggers in your database. You could inspect your tables one by one, but that can become quite labor intensive if you have 500 tables.
The article continues at http://builder.com.com/5100-6388_14-6142579.html?tag=sc