I am developing a Jax-WS web service using Spring WS (using RSA 7.5 and Java 1.6, Spring 3.0). I've a doubt if we can call webservice developed using JAX WS from a client which is developed in J2EE 1.4 or Java 1.4.
JAX-WS, JAX-RPC and SAAJ are just different Java APIs that can be used on one or on both sides of a WS connection. Your J2EE 1.4 tools should have no problems creating Java client code that accesses a WS that's implemented using JAX-WS.