The Jackrabbit OCM documentation is still in progress. We advise you also to review the unit tests to get an overview on current OCM features.
Jackrabbit OCM is a framework used to persist java objects (pojos) in a JCR repository including association, inheritance, polymorphism, composition, and the Java collections framework. It offers also features like version support, object locking and express queries with Java-based criteria, as well as with JCR query languages.
In order to easily support the JCR specification, any content application managing an high level object model can use this framework. For example, a classic Forum application contains objects like “Forum”, “Topic” and “Post”. Now, the data objects (pojo) can be managed by our JCR mapping tools in order to persist them into a JCR compliant repository.
The object content mapping framework was created for the following different reasons: