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The GlassFish V2 Web services stack consists of JAX-WS as the core platform and Project Tango (aka Web Services Interoperability Technology, WSIT) as an implementation of key WS-* specifications on top of it. This stack, so far referred as "JAX-WS RI + Project Tango", now has a new name - Project Metro.

"The biggest change you'll notice is a unified single name for what was called "GlassFish Web services stack" or "JAX-WS RI + Tango" so far. This is only a consolidation of our multiple offerings and is backed up high quality, high-performance and production-ready Web services stack integrated in GlassFish V2. This stack is also tested on Tomcat and has been reported to run on Jetty and JavaSE as well," said Arun Gupta, a Staff Engineer on Sun's Web Technologies and Standards Team.

The two main components of Metro are:

• JAX-WS - The Core Web services platform
• WSIT - Implementation of key WS-* specs and interoperability with .NET 3.0

The Core Web services that provides all the SOAP message functionality, including WS-Addressing and MTOM, is available from JAX-WS. Project Tango implements Security, Reliability and Transactions on this Core layer that interoperate with Windows Communication Foundation. All the applications on Metro can be easily developed using NetBeans 5.5.1 and deployed on GlassFish V2.

 https://metro.dev.java.net/ (https://metro.dev.java.net/)