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/LineSeries.java
* @see #isCurve()
	 * @see #setCurve(boolean)
	 * @generated
	 */
	void unsetCurve( );
	/**
	 * Returns whether the value of the '{@link org.eclipse.birt.chart.model.type.LineSeries#isCurve <em>Curve</em>}' attribute is set.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @return whether the value of the '<em>Curve</em>' attribute is set.
	 * @see #unsetCurve()
	 * @see #isCurve()
	 * @see #setCurve(boolean)
	 * @generated
	 */
	boolean isSetCurve( );
	/**
	 * Returns the value of the '<em><b>Shadow Color</b></em>' containment reference. <!-- begin-user-doc --> <!--
	 * end-user-doc --> <!-- begin-model-doc -->
	 * 
	 * Specifies the color to be used for the shadow.
	 * 
	 * <!-- end-model-doc -->
	 * 
	 * @return the value of the '<em>Shadow Color</em>' containment reference.
	 * @see #setShadowColor(ColorDefinition)
	 * @see org.eclipse.birt.chart.model.type.TypePackage#getLineSeries_ShadowColor()
	 * @model containment="true" resolveProxies="false" required="true"
	 * @generated
	 */
	ColorDefinition getShadowColor( );