GlassFish Server is the reference implementation for Java EE and also serves as proving grounds for the . Oracle  also unveiled on Wednesday an updated Java EE SDK, for building and deploying Java EE 6 applications. The SDK comes in two versions -- one for the entire Java EE 6 platform, and another just for the Java Web Profile for building Web applications. Labeled as Java EE 6 SDK Update 2, it is based on the open source edition of GlassFish 3.1 and features code samples, APIs, documentation, and tutorials.

GlassFish Server 3.1 offers increased compatibility with Oracle WebLogic Server 11g application server, including application portability, Oracle said. When Oracle acquired Sun Microsystems in early 2010, it added GlassFish to the other application servers in the Oracle product list, which included the WebLogic Server product gained when Oracle . WebLogic Server, according to Oracle, is designed to run the broader Oracle Fusion Middleware 11g portfolio.

in InfoWorld's Application Development Channel.