Bug 184762 BIRT Model - Enhancments to the level defintion
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/elements/ReportDesignConstants.java
String GRID_ITEM = "Grid"; 
	String GROUP_ELEMENT = "ListingGroup"; 
	String IMAGE_ITEM = "Image";  
	String LABEL_ITEM = "Label";  
	String LIBRARY_ELEMENT = "Library";  
	String LINE_ITEM = "Line";  
	String LIST_GROUP_ELEMENT = "ListGroup";  
	String LIST_ITEM = "List"; 
	String LISTING_ITEM = "Listing"; 
	String MASTER_PAGE_ELEMENT = "MasterPage"; 
	String MODULE_ELEMENT = "Module"; 	
	String PARAMETER_GROUP_ELEMENT = "ParameterGroup"; 
	String CASCADING_PARAMETER_GROUP_ELEMENT = "CascadingParameterGroup"; 
	String RECTANGLE_ITEM = "Rectangle"; 
	String REPORT_DESIGN_ELEMENT = "ReportDesign";  
	String REPORT_ITEM = "ReportItem";  
	String ROW_ELEMENT = "Row";  
	String SCALAR_PARAMETER_ELEMENT = "ScalarParameter";  
	String SCRIPT_DATA_SET = "ScriptDataSet"; 
	String SCRIPT_DATA_SOURCE = "ScriptDataSource"; 
	String SIMPLE_MASTER_PAGE_ELEMENT = "SimpleMasterPage"; 
	String STYLE_ELEMENT = "Style";  
	String TABLE_GROUP_ELEMENT = "TableGroup";  
	String TABLE_ITEM = "Table";  
	String TEXT_ITEM = "Text"; 
	String TEXT_DATA_ITEM = "TextData"; 
	String THEME_ITEM = "Theme"; 
	String TEMPLATE_PARAMETER_DEFINITION ="TemplateParameterDefinition"; 
	String TEMPLATE_ELEMENT = "TemplateElement"; 
	String TEMPLATE_REPORT_ITEM = "TemplateReportItem";