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
* <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @generated
	 * @ordered
	 */
	int TEXT_ALIGNMENT__HORIZONTAL_ALIGNMENT = 0;
	/**
	 * The feature id for the '<em><b>Vertical Alignment</b></em>' attribute.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @generated
	 * @ordered
	 */
	int TEXT_ALIGNMENT__VERTICAL_ALIGNMENT = 1;
	/**
	 * The number of structural features of the '<em>Text Alignment</em>' class.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @generated
	 * @ordered
	 */
	int TEXT_ALIGNMENT_FEATURE_COUNT = 2;
	/**
	 * The meta object id for the '{@link org.eclipse.birt.chart.model.attribute.impl.TooltipValueImpl <em>Tooltip Value</em>}' class.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @see org.eclipse.birt.chart.model.attribute.impl.TooltipValueImpl
	 * @see org.eclipse.birt.chart.model.attribute.impl.AttributePackageImpl#getTooltipValue()
	 * @generated
	 */
	int TOOLTIP_VALUE = 35;
	/**
	 * The feature id for the '<em><b>Text</b></em>' attribute. <!--
	 * begin-user-doc --> <!-- end-user-doc -->