Bug 204235 Background image can not be shown when preview as PPT [1205]
engine/org.eclipse.birt.report.engine.emitter.ppt/src/org/eclipse/birt/report/engine/emitter/ppt/PPTWriter.java
assert ( false );
		}
	}
	/**
	 * Creates a PPT Document.
	 * 
	 */
	public void start( )
	{
		if ( !imageNames.isEmpty( ) )
		{
			imageNames.clear( );
		}
		if ( !fileNamesLists.isEmpty( ) )
		{
			fileNamesLists.clear( );
		}
		println( "MIME-Version: 1.0" ); 
		println( "Content-Type: multipart/related; boundary=\"___Actuate_Content_Boundary___\"" ); 
		println( "" ); 
		println( "--___Actuate_Content_Boundary___" ); 
		println( "Content-Location: file:///C:/___Actuate___/slide-show" ); 
		println( "Content-Transfer-Encoding: quoted-printable" ); 
		println( "Content-Type: text/html; charset=\"utf-8\"" ); 
		println( "" ); 
		println( "<html" ); 
		println( "xmlns=3D'http://www.w3.org/TR/REC-html40'" ); 
		println( "xmlns:o=3D'urn:schemas-microsoft-com:office:office'" ); 
		println( "xmlns:p=3D'urn:schemas-microsoft-com:office:powerpoint'" ); 
		println( "xmlns:v=3D'urn:schemas-microsoft-com:vml'" );