Attemp to build loosely coupled WS using xsd:any & xsd:anyType?

Dear All,
i want to write a loosely coupled web service that allow
the server to evolve independently to the client. (main
purpose is to extend the service by adding more properties
in the request / response message)
i want to achieve the loosely coupled goal by adding
xsd:any or xsd:anyType to the request / response messages
(i.e. wsdl ComplexType). (just follow the normal XML
guideline).
i have try to write simple program with xsd:any (which
mapped to SOAPElement in JAX-RPC). And the result seems
good and can achieve my goal. ( i can consume the service
in java and .net without problem).
but later, i read some article, in the web, (like this: http://www.ibm.com/developerworks/xml/library/ws-tip-xsdcaution.html)
that clams it is better to use xsd:anyType instead of
xsd:any (as anyType is mapped to SOAPElement or java
object if server/client can deserialize it).
as far as i know, the support of xsd:anyType is not standardized / madatory.
could anyone tell me your comment about using xsd:anyType or xsd:any?
how about the support of xsd:anyType across different platform / tools?
xsd:anyAttribute seems not supported by jax-rpc, could you please comment on using this element in the wsdl? good or bad?
oracle will map this element to an oracle proprietary java object.
am i choosing the right way to achieve loosely-coupled WS? any other way?
some article claims to send request as xml doc. but it
seems that is not very convenient to server and client as
both sides need to write code for serialization /
deserialization.
why not use the existing automatic XML <--> java object provided by the jax-rpc standard?
Thank you very much
Message was edited by:
lsp

Hello,
Is your question related to very specific element of your message or for the complete message.
Using any/anyType even if powerful could be sometimes complex for Web Service Client developer to handle since the Java object (SOAPElement or Object) is not typed so doing late binding of schema force people to do the mapping themself any.
So before choosing this in a wide scope on your project think also to its impact for end user/developers, and I think you are on the good path, as you said anyType will recognize the object.
I am inviting you to also look at the Oracle Web Services Interoperability documentation.
and this article from SUN: Interoperability With Patterns and Strategies for Document-Based Web Services
Regards
Tugdual Grall

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package uk.ac.ic.devtest.rjmtest_jmssyncquery_ws.ws;
import javax.jws.WebMethod;
import javax.jws.WebParam;
import javax.jws.WebResult;
import javax.jws.WebService;
import javax.xml.bind.annotation.XmlSeeAlso;
import javax.xml.ws.Action;
import javax.xml.ws.BindingType;
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import uk.ac.ic.devtest.rjmtest_jmssyncquery_ws.types.ObjectFactory;
import uk.ac.ic.devtest.rjmtest_jmssyncquery_ws.types.RequestMessageType;
import uk.ac.ic.devtest.rjmtest_jmssyncquery_ws.types.ResponseMessageType;
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This works as designed as per the HTML standard:
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