<?xml version='1.0' standalone='yes'?> <extension name="editheader"> <command name="addheader"> <parameter type="tag" name="last" regex="last" occurrence="optional" /> <parameter type="string" name="field name" /> <parameter type="string" name="value" /> </command> <command name="deleteheader"> <parameter type="tag" name="index" regex="index" occurrence="optional"> <parameter type="number" name="field number" /> <parameter type="tag" name="last" regex="last" occurrence="optional" /> </parameter> <parameter type="matchtype" occurrence="optional" /> <parameter type="comparator" occurrence="optional" /> <parameter type="string" name="field name" /> <parameter type="stringlist" name="value patterns" occurrence="optional" /> </command> </extension>