Techniques for replicating a database object of a relational database managed by a database system from a first node on a network to a second node on the network include determining that the database object on the first node includes a user-defined object. A first routine of the database system is invoked....http://www.google.se/patents/US6889229?utm_source=gb-gplus-sharePatent US6889229 - Techniques for peer-to-peer replication of objects in a relational database
