[basex-talk] external parameters with basexgui?

Hi! I've been failing to find this for awhile now. I've got some queries which I need to run from both a command line, using Saxon, for production purposes, and from the BaseX GUI, for development and testing and "that looks weird..." purposes. Saxon requires that I pass in content as parameters. That's easy enough. Is there a way to do this -- pass an external parameter value to a query -- with the BaseX GUI? Thanks! Graydon