thanks for clarification.. i had a look on jbossws 2.0.1 examples now, but there is something i dont yet understand: actually what i would expect is to have some api to "attach" a DataHandler to a web service invocation. for example, im trying to invoke a web service exposed by ActiveBPEL engine which takes an array of strings. ActiveBPEL engine provides a set of methods to get attachments from an incoming invocation, but as far as i understood, these attachments dont have to be declared among invocation parameters. So what i would expect is a way to attach a payload (attachment) to my invocation without the need of having declared it somewhere.. is this possible with jbossws? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4119322#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...