if (g is "NOSIG" ) {
		rename(g,nosig);
		group g : dump; non_alpha na;
		alias nosigPresent=one;
}
if (! nosigPresent) {

		if (g is "BECMG" ) {
				alias presentTrend4=one;
				rename(g,changeIndicatorCodedTrend4);
				constant changeIndicatorTrend4="BECOMING";
				group g : dump; non_alpha na;
		}
		if (!defined(changeIndicatorTrend4) && g is "TEMPO" ) {
				alias presentTrend4=one;
				rename(g,changeIndicatorCodedTrend4);
				group g : dump; non_alpha na;
				constant changeIndicatorTrend4="TEMPORARY_FLUCTUATIONS";
		}
		if (defined(changeIndicatorTrend4)) {
				if (substr(g,0,2) is "AT" && length(g)==6 ) {
						rename(g,atTrend4);
						group g : dump; non_alpha na;
						beginHourTrend4=to_string(atTrend4,2,2);
						beginMinuteTrend4=to_string(atTrend4,4,2);
				}
				if (! defined(beginHourTrend4) && substr(g,0,2) is "FM" && length(g)==6) {
						rename(g,fromTrend4);
						group g : dump; non_alpha na;
						beginHourTrend4=to_string(fromTrend4,2,2);
						beginMinuteTrend4=to_string(fromTrend4,4,2);
				}
				if (! defined(beginHourTrend4) && substr(g,0,2) is "TL" && length(g)==6) {
						rename(g,untilTrend4);
						group g : dump; non_alpha na;
						endHourTrend4=to_string(untilTrend4,2,2) ;
						endMinuteTrend4=to_string(untilTrend4,4,2);
				}
				include "metar/wind_Trend4.def";

				include "metar/horizontalVisibility_Trend4.def";

				if ( ! isCavokTrend4) {
						include "metar/present_weather_Trend4.def";
						include "metar/clouds_Trend4.def";
				}
		} else {
				if (substr(g,0,2) is "FM") {
						alias presentTrend4=one;
						rename(g,fromTrend4);
						constant changeIndicatorTrend4="BECOMING";
						group g : dump; non_alpha na;
						beginHourTrend4=to_string(fromTrend4,2,2);
						beginMinuteTrend4=to_string(fromTrend4,4,2);
						include "metar/wind_Trend4.def";

						include "metar/horizontalVisibility_Trend4.def";

						if ( ! isCavokTrend4) {
								include "metar/present_weather_Trend4.def";
								include "metar/clouds_Trend4.def";
						}
				}
		}

		if (defined(fromTrend4) && !defined(untilTrend4)) {
				constant endHourTrend4="??";
				constant endMinuteTrend4="??";
				constant endDayTrend4="??";
				constant endMonthTrend4="??";
				constant endYearTrend4="??";
		}
		if (defined(untilTrend4) && !defined(fromTrend4)) {
				alias beginHourTrend4=hour;
				alias beginMinuteTrend4=minute;
				alias beginMonthTrend4=month;
				alias beginYearTrend4=year;
				alias beginDayTrend4=year;
		}



}