Looking at the entity-relationship diagram for a regulatory agency database they have attribute identifiers of PK, FKn, and U1. The first is the Primary Key and the second is a Foreign Key, but I've not before seen a 'Un' identifyier. I've no idea what DBMS they're using (but suspect Oracle). My web search used in-effective terms so I could not find the answer there. What does U1 represent? Rich -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
