I am not a royalist, but anyway: Today 16th April 2010 is the 70 years birthday of Queen Margrethe II of Denmark. Congratulations Your Majesty.
Having a queen (or king) and a royal family is a good example of that there are always exceptions. As a matter related to data quality: I would say that every person in our country has a first (given) name and a last (family) name. But the royal family hasn’t a last name – only they have some first names like those of Her Majesty being Margrethe Alexandrine Þórhildur Ingrid. (By the way: The third name is actually Icelandic; I guess that explains the ash cloud sent as a greeting from there.)
There are always exceptions. We may define data quality validation rules from here to doomsday – there will always be exceptions. We may write down business rules from now to eternity – tomorrow you will encounter the first exception. Data quality (and democracy) is never perfect – but it’s worth striving for.