POEM (Persistent Object Engine for Melati)

POEM provides:

• industrial-strength open source object database technology, delivering ODMG 3.0 compliant Java support.
• an API which enables the database to be seen as a collection of Java objects, via a (genuinely!) easy-to-use transparent persistence layer on top of JDBC.
• a low level security model allowing restrictions to be placed on tables, rows and fields.
• a three way unification of jdbc, sql and java metadata.
• A type system which enables string fields to be polymorphic.
• A transaction system which enables insulated sessions.
• Rich metadata and code generation which enables attractive rendering.