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
* @ordered
	 */
	int DATE_FORMAT_SPECIFIER__DETAIL = FORMAT_SPECIFIER_FEATURE_COUNT + 1;
	/**
	 * The number of structural features of the '<em>Date Format Specifier</em>' class.
	 * <!-- begin-user-doc --> <!--
	 * end-user-doc -->
	 * @generated
	 * @ordered
	 */
	int DATE_FORMAT_SPECIFIER_FEATURE_COUNT = FORMAT_SPECIFIER_FEATURE_COUNT + 2;
	/**
	 * The meta object id for the '{@link org.eclipse.birt.chart.model.attribute.impl.ExtendedPropertyImpl <em>Extended Property</em>}' class.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @see org.eclipse.birt.chart.model.attribute.impl.ExtendedPropertyImpl
	 * @see org.eclipse.birt.chart.model.attribute.impl.AttributePackageImpl#getExtendedProperty()
	 * @generated
	 */
	int EXTENDED_PROPERTY = 10;
	/**
	 * The meta object id for the '{@link org.eclipse.birt.chart.model.attribute.impl.GradientImpl <em>Gradient</em>}' class.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @see org.eclipse.birt.chart.model.attribute.impl.GradientImpl
	 * @see org.eclipse.birt.chart.model.attribute.impl.AttributePackageImpl#getGradient()
	 * @generated
	 */
	int GRADIENT = 15;
	/**
	 * The meta object id for the '{@link org.eclipse.birt.chart.model.attribute.impl.ImageImpl <em>Image</em>}' class.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->