[rules-users] Creating a business process programatically, Jbpm5 tutorials for beginners

Hi, i m a jbpm5 beginner and i m reading the Drools Developer's Cookbook -[Packt Publishing, Jan 2012] and on its chapter 9 :"jBPM5: Managing ,Business Processes" there is a sample project for Creating a business process manually (creating-process-using-the-api) in i which there is an EventNode instanciation : EventNode eventNode = new EventNode(); eventNode.setName("EventNode"); eventNode.setId(2); eventNode.setScope("external"); EventTypeFilter eventFilter = new EventTypeFilter(); eventFilter.setType(eventType); eventNode.addEventFilter(eventFilter); i want to understand what the "eventNode.setScope("external");" means and also about filters. i googled for the jbpm-flow-builder API but didnt find any documentation. i dont know where to find some tuorials for these stuffs.. thnx for help !