On 05-21-2011 17:10, Nick Matthews wrote: > I've yet to be convinced on the usefulness UUID/GUIDs, I'm never sure > what they're supposed to show. Facts should be linked to their source > and conclusions linked to the person who made them - anything else seems > to vague. Merely another form of primary key, but one which (allegedly) will always meet the uniqueness constraint even if generated by a different database. One way to distinguish two "different" records when no other difference can be seen. -- Wes Groleau There are two types of people in the world … http://Ideas.Lang-Learn.us/barrett?itemid=1157