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/Marker.java
*   <li>{@link org.eclipse.birt.chart.model.attribute.Marker#isVisible <em>Visible</em>}</li>
 *   <li>{@link org.eclipse.birt.chart.model.attribute.Marker#getIconPalette <em>Icon Palette</em>}</li>
 * </ul>
 * </p>
 *
 * @see org.eclipse.birt.chart.model.attribute.AttributePackage#getMarker()
 * @model extendedMetaData="name='Marker' kind='elementOnly'"
 * @generated
 */
public interface Marker extends EObject
{
	/**
	 * Returns the value of the '<em><b>Type</b></em>' attribute. The default value is <code>"Crosshair"</code>.
	 * The literals are from the enumeration {@link org.eclipse.birt.chart.model.attribute.MarkerType}. <!--
	 * begin-user-doc --> Gets the type of marker. <!-- end-user-doc --> <!-- begin-model-doc -->
	 * 
	 * Specifies the type of marker.
	 * 
	 * <!-- end-model-doc -->
	 * 
	 * @return the value of the '<em>Type</em>' attribute.
	 * @see org.eclipse.birt.chart.model.attribute.MarkerType
	 * @see #isSetType()
	 * @see #unsetType()
	 * @see #setType(MarkerType)
	 * @see org.eclipse.birt.chart.model.attribute.AttributePackage#getMarker_Type()
	 * @model default="Crosshair" unique="false" unsettable="true" required="true"
	 * @generated
	 */
	MarkerType getType( );