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/type/TypePackage.java
* The number of structural features of the '<em>Line Series</em>' class.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @generated
	 * @ordered
	 */
	int LINE_SERIES_FEATURE_COUNT = ComponentPackage.SERIES_FEATURE_COUNT + 6;
	/**
	 * The meta object id for the '{@link org.eclipse.birt.chart.model.type.impl.AreaSeriesImpl <em>Area Series</em>}' class.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @see org.eclipse.birt.chart.model.type.impl.AreaSeriesImpl
	 * @see org.eclipse.birt.chart.model.type.impl.TypePackageImpl#getAreaSeries()
	 * @generated
	 */
	int AREA_SERIES = 0;
	/**
	 * The feature id for the '<em><b>Visible</b></em>' attribute.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 * @ordered
	 */
	int AREA_SERIES__VISIBLE = LINE_SERIES__VISIBLE;
	/**
	 * The feature id for the '<em><b>Label</b></em>' containment reference.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 * @ordered
	 */