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/TypePackage.java
* <!-- end-user-doc --> <!-- begin-model-doc -->
 * 
 * Schema file for the chart.model package.
 * 
 * <!-- end-model-doc -->
 * 
 * @see org.eclipse.birt.chart.model.type.TypeFactory
 * @generated
 */
public interface TypePackage extends EPackage
{
	/**
	 * The package name.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @generated
	 */
	String eNAME = "type"; 
	/**
	 * The package namespace URI.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @generated
	 */
	String eNS_URI = "http://www.birt.eclipse.org/ChartModelType"; 
	/**
	 * The package namespace name.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @generated
	 */
	String eNS_PREFIX = "type"; 
	/**