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/impl/LineSeriesImpl.java
/**
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @generated
	 */
	public boolean isCurve( )
	{
		return curve;
	}
	/**
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @generated
	 */
	public void setCurve( boolean newCurve )
	{
		boolean oldCurve = curve;
		curve = newCurve;
		boolean oldCurveESet = curveESet;
		curveESet = true;
		if ( eNotificationRequired( ) )
			eNotify( new ENotificationImpl( this,
					Notification.SET,
					TypePackage.LINE_SERIES__CURVE,
					oldCurve,
					curve,
					!oldCurveESet ) );
	}
	/**
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @generated
	 */