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/impl/MarkerImpl.java
protected static final int SIZE_EDEFAULT = 0;
	/**
	 * The cached value of the '{@link #getSize() <em>Size</em>}' attribute.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @see #getSize()
	 * @generated
	 * @ordered
	 */
	protected int size = SIZE_EDEFAULT;
	/**
	 * This is true if the Size attribute has been set.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 * @ordered
	 */
	protected boolean sizeESet = false;
	/**
	 * The default value of the '{@link #isVisible() <em>Visible</em>}' attribute.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @see #isVisible()
	 * @generated
	 * @ordered
	 */
	protected static final boolean VISIBLE_EDEFAULT = false;
	/**
	 * The cached value of the '{@link #isVisible() <em>Visible</em>}' attribute.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @see #isVisible()
	 * @generated