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DataNucleus attempts to make the whole process of persisting data a transparent process.
The idea revolves around the developer having a series of Java classes that need persisting.
With DataNucleus, the developer defines the persistence of these classes using MetaData (or Java5
annotations), and byte-code "enhances" these classes. DataNucleus also provides SchemaTool that
allows for schema generation/validation before running your application, to make sure that all is
correctly mapped. Finally you provide persistence code (to manage the persistence of your objects),
and queries (to retrieve your persisted data).
DataNucleus Access Platform implements all JDO specifications (1.0, 2.0, and 2.1) and also the
JPA specification (JPA1). The following diagram shows the process for DataNucleus Access Platform
(several parts of the diagram are clickable giving more details).
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