Web Services Interoperability Technology (WSIT) is an open-source project started by Sun Microsystems to develop the next-generation of Web service technologies. It provides interoperability between Java Web Services and Microsoft's Windows Communication Foundation (WCF).^[1]

It consists of Java programming language APIs that enable advanced WS-* features to be used in a way that is compatible with Microsoft's Windows Communication Foundation as used by .NET. The interoperability between different products is accomplished by implementing a number of Web Services specifications, like JAX-WS that provides interoperability between Java Web Services and Microsoft Windows Communication Foundation.^[2]

WSIT is currently under development as part of Eclipse Metro.

WSIT is a series of extensions to the basic SOAP protocol, and so uses JAX-WS and JAXB. It is not a new protocol such as the binary DCOM.

WSIT implements the WS-I specifications, including:

• Metadata
  • WS-MetadataExchange
  • WS-Transfer
  • WS-Policy
• Security
  • WS-Security
  • WS-SecureConversation
  • WS-Trust
  • WS-SecurityPolicy
• Messaging
  • WS-ReliableMessaging
  • WS-RMPolicy
• Transactions
  • WS-Coordination
  • WS-AtomicTransaction

• JAX-WS

• Official website
• Sun Developer Network's WSIT page
• WS-I and WSIT - What's the difference?
• java.net project pages
  • WSIT java.net project page
  • GlassFish java.net project page
  • JAX-WS java.net project page
• WSIT documentation
  • WSIT Tutorial
• WS-I information
  • WS-I home page
  • Specifications
    • WS-MetadataExchange
    • WS-Transfer
    • WS-Security
    • WS-SecureConversation
    • WS-SecurityPolicy
    • WS-Trust
    • WS-ReliableMessaging
    • WS-RMPolicy
    • WS-Coordination^{[permanent dead link‍]}
    • WS-AtomicTransaction^{[permanent dead link‍]}
    • WS-Policy
    • WS-PolicyAttachment

A general framework, applicable but not limited to Web services, for interoperation of model-based services is described at