Bug 202254 Exception is thrown when category values are null and type of X axis is set to DateTime
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/model/data/impl/DataPackageImpl.java
* <b>http:///org/eclipse/emf/ecore/util/ExtendedMetaData </b>. <!--
	 * begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */
	protected void createExtendedMetaDataAnnotations( )
	{
		String source = "http:///org/eclipse/emf/ecore/util/ExtendedMetaData"; 				
		addAnnotation( actionEClass, source, new String[]{
				"name", "Action", 
				"kind", "elementOnly" 
		} );
		addAnnotation( getAction_Type( ), source, new String[]{
				"kind", "element", 
				"name", "Type" 
		} );
		addAnnotation( getAction_Value( ), source, new String[]{
				"kind", "element", 
				"name", "Value" 
		} );
		addAnnotation( baseSampleDataEClass, source, new String[]{
				"name", "BaseSampleData", 
				"kind", "elementOnly" 
		} );
		addAnnotation( getBaseSampleData_DataSetRepresentation( ),
				source,
				new String[]{
						"kind", "element", 
						"name", "DataSetRepresentation" 
				} );