Bug 104986 Backgound image uses an absolute path
Currently Chart uses an absolute path to indicate a backgournd image, that may cause the design unusable on other environments. Expected the background image can be definded in multiple ways like in report designer. e.g. URI(absolute path), File(relative path), Embedded Image(Encoded Image Data).
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/model/attribute/AttributePackage.java
*/
	int ACTION_TYPE_OBJECT = 69;
	/**
	 * The meta object id for the '<em>Anchor Object</em>' data type. <!--
	 * begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @see org.eclipse.birt.chart.model.attribute.Anchor
	 * @see org.eclipse.birt.chart.model.attribute.impl.AttributePackageImpl#getAnchorObject()
	 * @generated
	 */
	int ANCHOR_OBJECT = 70;
	/**
	 * The meta object id for the '<em>Angle Type Object</em>' data type.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @see org.eclipse.birt.chart.model.attribute.AngleType
	 * @see org.eclipse.birt.chart.model.attribute.impl.AttributePackageImpl#getAngleTypeObject()
	 * @generated
	 */
	int ANGLE_TYPE_OBJECT = 71;
	/**
	 * The meta object id for the '<em>Axis Type Object</em>' data type.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @see org.eclipse.birt.chart.model.attribute.AxisType
	 * @see org.eclipse.birt.chart.model.attribute.impl.AttributePackageImpl#getAxisTypeObject()
	 * @generated
	 */
	int AXIS_TYPE_OBJECT = 72;
	/**
	 * The meta object id for the '<em>Chart Dimension Object</em>' data type.