Support for the Software Development Kit (SDK) for Java Technology Edition 1.4 across supported operating system platforms (OS/400, Linux, UNIX, and Windows). SDK 1.4 support enables you to use Java technology to develop more demanding business applications with less effort and in less time.
JSP 1.2 including custom tag libraries
Java Servlets 2.3
Pre-release version of JSR 127 (Refer to the
Statement of direction section regarding iSeries support.)
Web Services (Simple Object Access Protocol [SOAP] 1.1, Web Services Description Language [WSDL], and Universal Description Discovery and Integration [UDDI] client)
Security model, including APIs, and J2EE authentication and authorization
XML tools, including Xerces and Xalan
Java Database Connectivity (JDBC)
Java Naming and Directory Interface (JNDI)
WebSphere Development Studio Client for iSeries -- the latest in tool integration for iSeries application development
For more details, please read WebSphere Application Server - Express for i5/OS software announcement letters: