What Does Java API for XML Web Services Mean?Java API for XML Web Services (JAX-WS) is the Java standard application program interface (API) for XML Web services. It is used to develop Web services and is a part of the Sun Java development kit (JDK). JAX-WS technology is used with other technologies, either from the core group or more enhanced Web services.
JAX-WS was designed to replace the existing JAX-RPC (remote procedure call). The name was changed to JAX-WS from JAX-RPC to reflect the shift from RPC-style to document-style Web services.
This term is also known as core Web services (a name given by Sun Microsystems) and JAX-WS RI.