JSR 109 (Implementing Enterprise Web Services) defines the programming
model and run-time architecture to deploy and look up Web services in the
Java EE environment; more specifically, in the Web, EJB, and Client Application
containers. One of its main goals is to ensure vendors' implementations interoperate.
JSR 109 builds on top of JAX-RPC to cover the use of JAX-RPC in a Java
EE environment, as well as the implementation and deployment of Web services
to a Java EE application server. JSR 109 defines a set of XML-based deployment
descriptors to standardize Web services and Web service client deployments
in the Java EE environment. JSR 921 was a maintenance revision of JSR 109,
and has since been replaced by the updated version of JSR 109.
For more information, refer to:
JSR 109, "Implementing Enterprise Web Services and
JSR 921: Implementing Enterprise Web Services 1.1.