    logging {
    	category string { string; ... };
    	channel string {
    		buffered boolean;
    		file quoted_string [ versions ( unlimited | integer ) ]
    		    [ size size ] [ suffix ( increment | timestamp ) ];
    		null;
    		print-category boolean;
    		print-severity boolean;
    		print-time ( iso8601 | iso8601-utc | local | boolean );
    		severity log_severity;
    		stderr;
    		syslog [ syslog_facility ];
    	};
    };