eccodes/definitions/metar/present_weather_Trend1.def

alias presentWeather1PresentTrend1=zero;
alias presentWeather2PresentTrend1=zero;
alias presentWeather3PresentTrend1=zero;
if (g is "NSW") {
		rename(g,nswTrend1);
		group g : dump; non_alpha na;

} else {

		if (is_in_list(g,"metar/present_weather.list")) {
				rename(g,presentWeather1Trend1);
				group g : dump; non_alpha na;
				alias presentWeather1PresentTrend1=one;
				if (is_in_list(g,"metar/present_weather.list")) {
						rename(g,presentWeather2Trend1);
						group g : dump; non_alpha na;
						alias presentWeather2PresentTrend1=one;
				}
				if (is_in_list(g,"metar/present_weather.list")) {
						rename(g,presentWeather3Trend1);
						group g : dump; non_alpha na;
						alias presentWeather3PresentTrend1=one;
				}
		}
		if (substr(g,0,1) is "-" || substr(g,0,1) is "+" || substr(g,0,2) is "FZ" || g is "//" ) {
				rename(g,wrongPresentWeatherTrend1);
				group g : dump; non_alpha na;
		}
    if (! presentWeather1PresentTrend1 ) { 
      if (is_in_list(g,"metar/present_weather.list")) {
        rename(g,presentWeather1Trend1);
        group g : dump; non_alpha na;
        alias presentWeather1PresentTrend1=one;
      }
    }
    if (!presentWeather2PresentTrend1) {
      if ( is_in_list(g,"metar/present_weather.list")) {
        rename(g,presentWeather2Trend1);
        group g : dump; non_alpha na;
        alias presentWeather2PresentTrend1=one;
      }
    }
    if (!presentWeather3PresentTrend1 ) { 
      if ( is_in_list(g,"metar/present_weather.list")) {
        rename(g,presentWeather3TrendTrend11);
        group g : dump; non_alpha na;
        alias presentWeather3PresentTrend1=one;
      }
    }
}