Bug 117148 Support Accessibility
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/model/attribute/impl/AttributeFactoryImpl.java
case AttributePackage.RISER_TYPE :
				return convertRiserTypeToString( eDataType, instanceValue );
			case AttributePackage.RULE_TYPE :
				return convertRuleTypeToString( eDataType, instanceValue );
			case AttributePackage.SCALE_UNIT_TYPE :
				return convertScaleUnitTypeToString( eDataType, instanceValue );
			case AttributePackage.SORT_OPTION :
				return convertSortOptionToString( eDataType, instanceValue );
			case AttributePackage.STRETCH :
				return convertStretchToString( eDataType, instanceValue );
			case AttributePackage.STYLED_COMPONENT :
				return convertStyledComponentToString( eDataType, instanceValue );
			case AttributePackage.TICK_STYLE :
				return convertTickStyleToString( eDataType, instanceValue );
			case AttributePackage.TRIGGER_CONDITION :
				return convertTriggerConditionToString( eDataType,
						instanceValue );
			case AttributePackage.TRIGGER_FLOW :
				return convertTriggerFlowToString( eDataType, instanceValue );
			case AttributePackage.UNITS_OF_MEASUREMENT :
				return convertUnitsOfMeasurementToString( eDataType,
						instanceValue );
			case AttributePackage.VERTICAL_ALIGNMENT :
				return convertVerticalAlignmentToString( eDataType,
						instanceValue );
			case AttributePackage.ACTION_TYPE_OBJECT :
				return convertActionTypeObjectToString( eDataType,
						instanceValue );
			case AttributePackage.ANCHOR_OBJECT :
				return convertAnchorObjectToString( eDataType, instanceValue );