Storing Objects in a Database Usenet articles on how one can make objects persistent without the code becoming dependent on a specific database technology. http://ootips.org/persistent-objects.html

Mapping Objects to Relational Databases Explains how to map inheritance hierarchies and many-to-many relationships to a relational data model by yourself. http://www-106.ibm.com/developerworks/library/mapping-to-rdb/index.html

Using Object-Oriented Databases: A Step-By-Step Tutorial Walk through of the development of an OODB application complete with source code. Running example is a phone book application using Java, XML and Objectstore PSE. http://www.devx.com/dbzone/articles/sf0701/sf0701-1.asp

Object Data Management Group (ODMG) Industry association for a common OO data standard. Extracts of ODMG 3.0 as well as some explaining articles are online. Note: Standard is partially superceded by JDO. http://www.odmg.org/