I am looking at this http://www.ws-i.org/Profiles/BasicProfile-1.1.html and it doesnt mention anything about the complex types with extensions from what I can see. At any rate, is it really the policy of jbossWS to develop features that only work in the lowest common denominator? not adding features because not all possible consumers are object oriented seems kind of odd. doesnt it make more sense to give those developers creating services as many tools as possible and allow them to choose whether they want to use features not all languages can consume. Anyway, the complexType extension stuff is really just a simple way to define the schema and allowed attributes. it doesnt matter if you are object oriented or not, the xml parser should be able to use this to validate. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3961432#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...