The workflow harvester is actually a very basic harvester that does nothing more then create the initial DigitalObject for the standard harvest/transform/index stack.
Have a look at the wiki page linked below for more information.
Useful links:
This plugin was written by University of Southern Queensland staff and is freely available as Open Source under GPL v2+:
/* * The Fascinator - Plugin - Harvester - Workflows * Copyright (C) 2010-2011 University of Southern Queensland * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */