<?xml version="1.0" encoding="UTF-8"?>
<configuration xmlns="http://java.sun.com/xml/ns/jax-rpc/ri/config">
 <service name="Chat_Service" targetNamespace="http://echoservice.org/wsdl" typeNamespace="http://echoservice.org/types" packageName="chat">
 
     <interface name="chat.Chat" servantName="chat.ChatImpl"/> 
 </service>  
</configuration> 
 

• Description:
• Top line: meta-information.
• configuration tag: Not sure what that URL is.  I went there and got a file not found message.
• service: the name of the service.  I did not change the targetNamesace or typeNamespace.  But perhaps I can alter these to be specific to my machine.  I changed the package to chat.
• interface name is the name of the Chat interface, plus its package.  servantName is the name of the class on the server that implements Chat.
• Close tags.