Bug 117148 Support Accessibility
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/model/attribute/util/AttributeValidator.java
case AttributePackage.ANGLE_TYPE :
				return validateAngleType( (AngleType) value,
						diagnostics,
						context );
			case AttributePackage.AXIS_TYPE :
				return validateAxisType( (AxisType) value, diagnostics, context );
			case AttributePackage.CHART_DIMENSION :
				return validateChartDimension( (ChartDimension) value,
						diagnostics,
						context );
			case AttributePackage.CHART_TYPE :
				return validateChartType( (ChartType) value,
						diagnostics,
						context );
			case AttributePackage.DATA_POINT_COMPONENT_TYPE :
				return validateDataPointComponentType( (DataPointComponentType) value,
						diagnostics,
						context );
			case AttributePackage.DATA_TYPE :
				return validateDataType( (DataType) value, diagnostics, context );
			case AttributePackage.DATE_FORMAT_DETAIL :
				return validateDateFormatDetail( (DateFormatDetail) value,
						diagnostics,
						context );
			case AttributePackage.DATE_FORMAT_TYPE :
				return validateDateFormatType( (DateFormatType) value,
						diagnostics,
						context );
			case AttributePackage.DIRECTION :
				return validateDirection( (Direction) value,