Bug 117149 Add additional datapoint markers
I would like to propose adding additional datapoint markers. Attached is a set of markers I would like supported.
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/model/attribute/AttributePackage.java
/**
		 * The meta object literal for the '{@link org.eclipse.birt.chart.model.attribute.impl.GradientImpl <em>Gradient</em>}' class.
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 * @see org.eclipse.birt.chart.model.attribute.impl.GradientImpl
		 * @see org.eclipse.birt.chart.model.attribute.impl.AttributePackageImpl#getGradient()
		 * @generated
		 */
		EClass GRADIENT = eINSTANCE.getGradient( );
		/**
		 * The meta object literal for the '<em><b>Start Color</b></em>' containment reference feature.
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 * @generated
		 */
		EReference GRADIENT__START_COLOR = eINSTANCE.getGradient_StartColor( );
		/**
		 * The meta object literal for the '<em><b>End Color</b></em>' containment reference feature.
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 * @generated
		 */
		EReference GRADIENT__END_COLOR = eINSTANCE.getGradient_EndColor( );
		/**
		 * The meta object literal for the '<em><b>Direction</b></em>' attribute feature.
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 * @generated
		 */
		EAttribute GRADIENT__DIRECTION = eINSTANCE.getGradient_Direction( );