Hi The Saxon version used in "XML Editor 9.3, build 2008081313" is still 9.0.0.6. I tried to add the latest 9.1.0.2 but there is no support for parameters for custom processors. Did I miss anything? Here is what I would have thought to be able to do: when asking oXygen to add a processor, beside to be able to give it the command line, it should be possible to say "this processor is of well-known kind 'Saxon B'". Because oXygen already knowns how to support Saxon B, the user only need to give the directory where he put the JARs (and the license for the equivalent support for Saxon SA.) And this mechanism could be used for other kind of processor as well (libxslt, MarkLogic, eXist...) Did I miss something that looks like that? Or at least that allows me either to use parameters with custom processors or to update the Saxon version used? Best regards, --drkm