Bug 117148 Support Accessibility
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/model/attribute/impl/AttributeFactoryImpl.java
case AttributePackage.DATE_FORMAT_TYPE :
				return convertDateFormatTypeToString( eDataType, instanceValue );
			case AttributePackage.DIRECTION :
				return convertDirectionToString( eDataType, instanceValue );
			case AttributePackage.GROUPING_UNIT_TYPE :
				return convertGroupingUnitTypeToString( eDataType,
						instanceValue );
			case AttributePackage.HORIZONTAL_ALIGNMENT :
				return convertHorizontalAlignmentToString( eDataType,
						instanceValue );
			case AttributePackage.INTERSECTION_TYPE :
				return convertIntersectionTypeToString( eDataType,
						instanceValue );
			case AttributePackage.LEADER_LINE_STYLE :
				return convertLeaderLineStyleToString( eDataType, instanceValue );
			case AttributePackage.LEGEND_BEHAVIOR_TYPE :
				return convertLegendBehaviorTypeToString( eDataType,
						instanceValue );
			case AttributePackage.LEGEND_ITEM_TYPE :
				return convertLegendItemTypeToString( eDataType, instanceValue );
			case AttributePackage.LINE_DECORATOR :
				return convertLineDecoratorToString( eDataType, instanceValue );
			case AttributePackage.LINE_STYLE :
				return convertLineStyleToString( eDataType, instanceValue );
			case AttributePackage.MARKER_TYPE :
				return convertMarkerTypeToString( eDataType, instanceValue );
			case AttributePackage.ORIENTATION :
				return convertOrientationToString( eDataType, instanceValue );
			case AttributePackage.POSITION :
				return convertPositionToString( eDataType, instanceValue );