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 '<em><b>Value</b></em>' attribute feature.
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 * @generated
		 */
		EAttribute TEXT__VALUE = eINSTANCE.getText_Value( );
		/**
		 * The meta object literal for the '<em><b>Font</b></em>' containment reference feature.
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 * @generated
		 */
		EReference TEXT__FONT = eINSTANCE.getText_Font( );
		/**
		 * The meta object literal for the '<em><b>Color</b></em>' containment reference feature.
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 * @generated
		 */
		EReference TEXT__COLOR = eINSTANCE.getText_Color( );
		/**
		 * The meta object literal for the '{@link org.eclipse.birt.chart.model.attribute.impl.TextAlignmentImpl <em>Text Alignment</em>}' class.
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 * @see org.eclipse.birt.chart.model.attribute.impl.TextAlignmentImpl
		 * @see org.eclipse.birt.chart.model.attribute.impl.AttributePackageImpl#getTextAlignment()
		 * @generated
		 */
		EClass TEXT_ALIGNMENT = eINSTANCE.getTextAlignment( );
		/**