# About EclipseLink 4.0

January 02, 2026

## About This Content

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, and XML. 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, Service Data Objects (SDO), and Database Web services (DBWS).

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

### License

The Eclipse Foundation makes available all content in this plug-in ("Content"). Unless otherwise indicated below, the Content is provided to you under the terms and conditions of the Eclipse Public License Version 2.0 ("EPL"). A copy of the EPL is available at https://www.eclipse.org/legal/epl-2.0. For purposes of the EPL, "Program" will mean the Content.

If you did not receive this Content directly from the Eclipse Foundation, the Content is being redistributed by another party ("Redistributor") and different terms and conditions may apply to your use of any object code in the Content. Check the Redistributor's license that was provided with the Content. If no such license exists, contact the Redistributor. Unless otherwise indicated below, the terms and conditions of the EPL still apply to any source code in the Content and such source code may be obtained at https://www.eclipse.org.

### Third Party Content

The Content includes items that have been sourced from third parties as set out below. If you did not receive this Content directly from the Eclipse Foundation, the following is provided for informational purposes only, and you should look to the Redistributor's license for terms and conditions of use.

- EclipseLink SDO
  - Service Data Objects (SDO)
- Utilities
  - WSDL4J 1.6.3

#### Service Data Objects (SDO) v2.1.1

> The Service Data Objects (SDO) API is distributed under a CDDLv1.0 and custom license. It provides the standard API implemented by the EclipseLink Project's SDO component.

#### WSDL4j v1.6.3

> WSDL4J 1.6.3 is available for download from the wsdl4j project. It distributed under CPLv1.0 .

> This jar is only required at design time for the DBWS Builder utility.