Pro SQL Server Relational Database Design and Implementation, Fifth Edition

Now, to use this data, you have to indicate the table you want to join to, which is very much an unnatural way to do a join. You can use a universally unique GUID key so that all references to the data in the table are unique, eliminating the need for the specifically specified related table name. However, I find when this method is employed if the RelatedTableName is actually used, it is far clearer to the user what is happening.

A major concern with this method is that you cannot use constraints to enforce the relationships; you need either to use triggers or to trust the middle layers to validate data values, which definitely increases the costs of implementation/testing, since you have to verify that it works in all cases, which is something ...