Bug 389229 Documentation of possible values/objects of property IDeviceRenderer.FILE_IDENTIFIER
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/device/IDeviceRenderer.java
* 
	 * @return The locale to be used
	 * @since 2.1
	 */
	ULocale getULocale( );
	
	/**
	 * Returns the MIME type of the output image that the device renderer
	 * creates. Returns null in case of native rendering (no image file is created)
	 * 
	 * @return the MIME type as a String (e.g. "image/png")
	 * @since 2.3
	 */
	String getMimeType( );
	/**
	 * Returns the chart computation.
	 * 
	 * @return IChartComputation
	 * @since 2.5
	 */
	IChartComputation getChartComputation( );
	/**
	 * Sets the chart computation.
	 * 
	 * @param cComp
	 *            IChartComputation
	 * @since 2.5
	 */
	void setChartComputation( IChartComputation cComp );
}