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
} );
		addAnnotation( sampleDataEClass, source, new String[]{
				"name", "SampleData", 
				"kind", "elementOnly" 
		} );
		addAnnotation( getSampleData_BaseSampleData( ), source, new String[]{
				"kind", "element", 
				"name", "BaseSampleData" 
		} );
		addAnnotation( getSampleData_OrthogonalSampleData( ),
				source,
				new String[]{
						"kind", "element", 
						"name", "OrthogonalSampleData" 
				} );
		addAnnotation( getSampleData_AncillarySampleData( ),
				source,
				new String[]{
						"kind", "element", 
						"name", "AncillarySampleData" 
				} );
		addAnnotation( seriesDefinitionEClass, source, new String[]{
				"name", "SeriesDefinition", 
				"kind", "elementOnly" 
		} );
		addAnnotation( getSeriesDefinition_Query( ), source, new String[]{
				"kind", "element", 
				"name", "Query" 
		} );
		addAnnotation( getSeriesDefinition_SeriesPalette( ),