Bug 198594 XLS Emitter: Decimal value exported as String instead of Number
engine/org.eclipse.birt.report.engine.emitter.prototype.excel/src/org/eclipse/birt/report/engine/emitter/excel/ExcelWriter.java
writer.closeTag( "Styles" );
	}
	public void close( boolean complete )
	{
		if ( complete )
		{
			writer.closeTag( "Workbook" );
		}
		writer.close( );
	}
	public void startSheet( String name )
	{
		writer.openTag( "Worksheet" );
		writer.attribute( "ss:Name", name );
	}
	public void startSheet( )
	{
		startSheet( "Sheet1" );
	}
	public void closeSheet( )
	{
		writer.closeTag( "Worksheet" );
	}
	public void startTable( int[] width )
	{
		writer.openTag( "ss:Table" );
		if ( width == null )
		{
			logger.log( Level.SEVERE, "Invalid columns width" );
			return;