Bug 150347 Support binary stream as preview image.
See 144843. We need model to save binary strame as report preview image. Currently, preview image is an external image. Maybe need a type to distinguish preview image type.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/command/NameSpaceEvent.java
/*******************************************************************************
 * Copyright (c) 2004 Actuate Corporation.
 * 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
 *
 * Contributors:
 *  Actuate Corporation  - initial API and implementation
 *******************************************************************************/
package org.eclipse.birt.report.model.api.command;
import org.eclipse.birt.report.model.api.activity.NotificationEvent;
import org.eclipse.birt.report.model.core.DesignElement;
/**
 * Indicates that the contents of a name space changed.
 * 
 */
public class NameSpaceEvent extends NotificationEvent
{
	/**
	 * New name is added into some name space.
	 */
	public static final int ADD = 1;
	/**
	 * Name is removed from some name space.
	 */
	public static final int REMOVE = 2;
	/**
	 * The element in namespace is renamed.