EclipseLink 4.0 Read Me

January 02, 2026

The EclipseLink project's goal is to provide a complete persistence framework that is both comprehensive and universal. It runs in any Java environment and reads and writes objects to virtually any type of data source, including relational databases, XML, JSON, or EIS systems. EclipseLink focuses on providing leading edge support, including advanced feature extensions, for the dominant persistence standards for each target data source; Jakarta Persistence API (JPA) for relational databases, Jakarta XML Binding (JAXB) for XML, Jakarta Connectors (JCA) for EIS and other types of legacy systems, and Service Data Objects (SDO).

For tips on getting started with EclipseLink, please see the following resources:

- EclipseLink Home Page
- EclipseLink 4.0 Release Notes
- Documentation
- Examples and How To