Until a more permanent home can be built for the Eclipse BPMN2 Metamodel Project, this update site can be used to install the plug-ins in your Eclipse Workbench. These plug-ins are required to build the BPMN2 Modeler from source code.
You can install the BPMN2 Metamodel plug-ins from the eclipse Help -> Install New Software... menu:
http://download.eclipse.org/bpmn2-modeler/bpmn2/sitePlease note that the update from this location will include only the BPMN2 metamodel. All the other necessary Eclipse components like EMF, Graphiti, GEF, etc. must be installed separately.