Hello folks I'm an engineering student and I would be very interested to learn the pros and cons between these two DataBases: - Versant : commercial OODBMS (Object-Oriented) - PostgreSQL : open source ORDBMS (Object-Relational) (Other DB like Oracle are ERDBMS and not ORDBMS if I guess right) It seems to me the main disadvantage of ORDBMS is the still presence of Impendance Mismatch, which is completely absent in OODBMS. Well, I would like to focus the meaning of the "Object" point of view of PostgreSQL: does it offer just the arbitrariness of data structure? What else? Can a row be assimilated to an object ? Please let me know any experiences which can show interesting aspects of PostreSQL vs Versant (and/or other OODBMS in general) ? The good thing in Versant is that it's 100% Object-Oriented and works well with Java (through JVI interface). The sad thing is that it's closed-source and it's very commercial. The good thing in PostgreSQL is that it's open-source and is available everywhere. I hope to find a lot of more good points related to PostgreSQL. Regards Nico
