RuleModeler

The rule modeler is a People-Centric User Interface (UI) application used to create, modify, and administer policies.
If you use WOLips' "Bundleless Builds" feature, then you don't need to configure RuleModeler.app to work with Eclipse, because with that feature turned off, Eclipse no longer needs to be slapped upside the head to catch changes to the .d2wmodel files.
To configure rule modeler to work with the Eclipse/WOLips toolset during D2W development, you need to first set up the WOLips server in Eclipse preferences under WOLips->WOLips Server