Presentations provide a content structure for the task list. True for presentations that are intended to be primary and required for typical usage, false for additional presentations that are secondary. Reflected in the UI, e.g. by ordering secondary presentations below primary ones. 2.0 Copyright (c) 2009 Tasktop Technologies and others. All rights reserved. This program and the accompanying materials are made available under the terms of the Eclipse Public License v1.0 which accompanies this distribution, and is available at http://www.eclipse.org/legal/epl-v10.html