4.0.0 javax.xml jax-qname 1.1 Java API for XML-Based RPC (JAX-RPC) The Java API for XML based RPC (JAX-RPC) enables Java technology developers to build Web applications and Web services incorporating XML based RPC functionality according to the SOAP (Simple Object Access Protocol) 1.1 specification. http://java.sun.com/webservices/jaxrpc/index.jsp http://java.sun.com/xml/downloads/jaxrpc.html