SOAP Solution

Hi,

I am working on the digital library project where I need to migrate a
digital contents like doc, pdf, rtf, htmls from the client side  to server
side digital preservation system. I am trying to find out different
solutions to fascilitates this data transfer on the regular basis. I am
exploring SOAP , AXIs , SAAJ  protocol. Client side application is already
web based application.

Does anybody give me some inputs about these 3 methods , which one will be
better ? and also if there is any other way of migration of the data ?

-
Kirti