Java API for XML-Based RPC 1.0 (JAX-RPC) (javax.xml.rpc.*)
SOAP with Attachments API for Java 1.1 (SAAJ) (javax.xml.soap.*)

Packages
javax.xml.rpc  
javax.xml.rpc.encoding  
javax.xml.rpc.handler  
javax.xml.rpc.handler.soap  
javax.xml.rpc.holders  
javax.xml.rpc.server  
javax.xml.rpc.soap  
javax.xml.soap