Parsing (skipping) unknown tags with JAXB...

Question

Does anybody know how can I skip unrecognised tags, during unmarshalling an XML document with JAXB?
For example : the schema-compliant document is :
<document>
<Version>3.20</Version>
<Account>Account</Account>
<Password>Password</Password>
</document>
and a possible modification would be :
<document>
<Version>3.21</Version>
<unknowntag>aaaabbbb</unknowntag>
<Account>Account</Account>
<Password>Password</Password>
</document>
(a new unknown tag was introduced).
so : the document is well-formed anyway (not strictly valid), but the second time a new unknown tag was introduced. I couldn't map it to a Java object (of course, because my data model could not foresee it), but I would like JAXB to skip it and have the program flow behaving exactly as the first case... ignoring this new unknown tag.
Thanks for any answer anybody could ever give me...
Emilio.

Answer 1

Finally I found a workaround to this problem :
I used an XSL transformation from the incoming document into itself, according to the pattern matching provided by an xsl stylesheet, before giving it to JAXB. Definitely an XSL specular preprocessor (wow! sound cool!).
That is :
having an incoming XML document, I write an XSL stylesheet that transforms the original XML document into another XML having the same tags (that is... itself).
In this way, I can then give to JAXB a resulting XML document that contains ONLY those tags that I was expecting it to elaborate, since all the others (the unknown ones) were discarded by the xsl preprocessor.
And... that's it.
In this way I finally wrote an application able to skip unrecognized tags and elaborating by JAXB only the know ones. And that's what I was looking for :-)
Hope it could help you.
Bye,
emils.