[NTG-context] typesetting serial letters in Context

Hello all, I have been using Context mkii with the x-corres.mkii module for a number of years now, for many different purposes (mailings, certificates, etc). The module works with an xml (actually rng) file with the following structure: <contacts> <formalname>Janssen</formalname> <informalname>Piet</informalname> </contact> </contacts> The contents of each item is grabbed and put in the document by means of the command \XMLflush{formalname}. I would like to shift to mkiv now with all its possibilities. Yet there is no x-corres.mkiv. Who can help me out? Regards, Robert