Taco provided this solution off-list:
> Try this:
>
> \defineXMLargument
> [cite]
> {\expanded{\cite[\XMLpar{cite}{key}{}][\XMLpar{cite}{id}{}]}}
>
> The immediate expansion make sure that the right things are
> remembered._______________________________________________ ntg-context mailing list ntg-context@ntg.nl http://www.ntg.nl/mailman/listinfo/ntg-context
