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
* Returns the meta object for class '{@link org.eclipse.birt.chart.model.attribute.CallBackValue <em>Call Back Value</em>}'.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @return the meta object for class '<em>Call Back Value</em>'.
	 * @see org.eclipse.birt.chart.model.attribute.CallBackValue
	 * @generated
	 */
	EClass getCallBackValue( );
	/**
	 * Returns the meta object for the attribute '{@link org.eclipse.birt.chart.model.attribute.CallBackValue#getIdentifier <em>Identifier</em>}'.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @return the meta object for the attribute '<em>Identifier</em>'.
	 * @see org.eclipse.birt.chart.model.attribute.CallBackValue#getIdentifier()
	 * @see #getCallBackValue()
	 * @generated
	 */
	EAttribute getCallBackValue_Identifier( );
	/**
	 * Returns the meta object for class '{@link org.eclipse.birt.chart.model.attribute.ColorDefinition <em>Color Definition</em>}'.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @return the meta object for class '<em>Color Definition</em>'.
	 * @see org.eclipse.birt.chart.model.attribute.ColorDefinition
	 * @generated
	 */
	EClass getColorDefinition( );
	/**
	 * Returns the meta object for the attribute '{@link org.eclipse.birt.chart.model.attribute.ColorDefinition#getTransparency <em>Transparency</em>}'.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @return the meta object for the attribute '<em>Transparency</em>'.