The same probably goes for parameters. Similar to options, parameters are QName/value pairs, but they are passed to the pipeline by using special types of input ports (so called parameter input ports). In order to pass a parameter to a pipeline, you must be able to specify: 1. name of the parameter input port (if not specified, the primary parameter input port is used) 2. parameter name 3. parameter value The simplest solution to me seems to change the XProcTransformerInterface.transform() method so that it allows specifying options and parameter input ports mappings. (Maybe adding methods getOptions() and getparameterInputPorts() will be necessary, too). Regards, Vojtech -- Vojtech Toman Principal Software Engineer EMC Corporation toman_vojtech@emc.com http://developer.emc.com/xmltech