Bug 155493 [Deploy] Pictures and chart pictures are lost when preview on Weblogic Server using WAR deploy
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/utility/ParameterAccessor.java
*/
	public static final String SERVLET_PATH_DOWNLOAD = "/download"; 
	
	/**
	 * URL parameter name that gives the report design name.
	 */
	public static final String PARAM_REPORT = "__report"; 
	/**
	 * URL parameter name that gives the report document name.
	 */
	public static final String PARAM_REPORT_DOCUMENT = "__document"; 
	/**
	 * URL parameter name that gives the format to display the report, html or
	 * pdf.
	 */
	public static final String PARAM_FORMAT = "__format"; 
	/**
	 * Format parameter constants to display the report in html.
	 */
	public static final String PARAM_FORMAT_HTM = "htm"; 
	public static final String PARAM_FORMAT_HTML = "html"; 
	/**
	 * Format parameter constants to display the report in pdf.
	 */
	public static final String PARAM_FORMAT_PDF = "pdf"; 
	/**
	 * URL parameter name that gives the locale.
	 */
	public static final String PARAM_LOCALE = "__locale"; 
	/**