Bug 199360 Provide new servlet to retrieve html fragment when in reportlet mode
Currently in reportlet mode, the framesset servlet will still wrap and return all ajax viewer code. We need a new servlet to return only html fragment generated by engine. Then this fragment can be further parsed by client side according to user's requirement.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/IBirtConstants.java
public static final String OPRAND_SVG = "__svg"; 
	public static final String OPRAND_TASKID = "__taskid"; 
	public static final String OPRAND_ISTOC = "__istoc"; 
	public static final String OPRAND_PARAM = "param"; 
	public static final String OPRAND_IID = "iid"; 	
	
	public static final String MIME_TYPE = "text/xml"; 
	public static final String HTML_RENDER_FORMAT = HTMLRenderOption.OUTPUT_FORMAT_HTML;
	public static final String PDF_RENDER_FORMAT = HTMLRenderOption.OUTPUT_FORMAT_PDF;
	public static final String POSTSCRIPT_RENDER_FORMAT = "postscript"; 
	public static final String DOC_RENDER_FORMAT = "doc"; 
	
	
	public static final String VIEWER_FRAMESET = "frameset"; 
	
	public static final String VIEWER_RUN = "run"; 
	
	
	public static final String VIEWER_PREVIEW = "preview"; 
	
	public static final String VIEWER_PARAMETER = "parameter"; 
	
	public static final String VIEWER_DOCUMENT = "document"; 
	
	public static final String SERVLET_PATH_FRAMESET = "/" + VIEWER_FRAMESET; 
	
	public static final String SERVLET_PATH_RUN = "/" + VIEWER_RUN; 
	
	public static final String SERVLET_PATH_PREVIEW = "/" + VIEWER_PREVIEW;