About XStream version numbers...

# Stable Version: 1.4.9

- Binary distribution: Contains the XStream jar files, the Hibernate and Benchmark modules and all the dependencies.
- Source distribution: Contains the complete XStream project as if checked out from the Subversion version tag.
- XStream Core only: The xstream.jar only as it is downloaded automatically when it is referenced as Maven dependency.
- XStream Hibernate module: The xstream-hibernate.jar as it is downloaded automatically when it is referenced as Maven dependency.
- XStream JMH module: The xstream-jmh.jar as it is downloaded automatically when it is referenced as Maven dependency.

# Previous Releases

Previous releases of XStream are also available. However, use of the latest stable version is recommended.

- Previous releases (>= 1.2)
- Previous releases (<= 1.2)

# Optional Dependencies

- Supported XML parsers and packages:
  - XmlPull, the XML pull parser API and factory to detect available implementations.
  - Xpp3, an XML pull parser (recommended).
  - kXML2 or kXML2-min, an XML pull parser.
  - DOM4J, easy XML representation and manipulation framework.
  - JDOM, easy XML representation and manipulation (requires Java 1.2, superseded by JDOM2).
  - JDOM2, easy XML representation and manipulation, successor of JDOM (requires Java 5).
  - StaX, the reference implementation of the Streaming API for XML.
  - Woodstox, an alternate open source StaX implementation.
  - XOM, another alternative XML API.
- Other optional 3rd party dependencies:
  - Joda Time for optional ISO8601 date/time formats.
  - CGLIB for optional support of some proxies generated with the CGLIB Enhancer.
  - Jettison for serialization and deserialization support with JSON. Note, that newer versions 1.3.x are no longer compatible with XStream.
  - Jettison 1.0.1 for serialization and deserialization support with JSON in JDK 1.4. Note, that newer version 1.1 is not compatible with XStream.

# Dependencies Hibernate Module

- Supported Hibernate versions:
  - Hibernate Core 4.2.5, for Java 6 or higher.
  - Hibernate Core 3.6.6, for Java 5.
  - Hibernate Core 3.3.2, for Java 1.4.
- Supported Hibernate Envers versions:
  - Hibernate Envers 4.2.5, for Java 6 or higher.
  - Hibernate Envers 3.6.6, for Java 5.

# Dependencies JMH Module

- JMH dependencies:
  - JMH Core 1.11.1, for Java 6 or higher.
  - JMH Generator Annotation Processor 1.11.1, for Java 6 or higher.