[basex-talk] Namespace conflict in XQuery update

While trying to transform an xhtml document I ran into this general case:

copy $ul := <ul xmlns="http://www.w3.org/1999/xhtml"> <li>item</li> <li>item</li> </ul>

modify ( rename node $ul as QName("http://www.w3.org/1999/xhtml%22,%22ol"), insert node attribute class {"a"} into $ul ) return $ul

which throws an "[XUDY0024] New namespaces conflict with each other." error.

After reading the XQuery update facility recomendation it wasn't clear to me if this is supposed to happen. Do I *have* to use chained copy statements to achieve both renaming a node an inserting an attribute?

Thanks, Alex