The forecast change indicator type, including temporary, permanent, or probable conditions.  This is an extension of ForecastChangeIndicator that includes report-specific entries, and in particular the 30 and 40% probability conditions.<br/><br/>Note that the TAC representations for "FM", "TL", and "AT" are represented by the phenomenonTime on the change forecast (MeteorologicalAerodromeForecast):<br/>    FM and TL - a phenomenonTime with a TimePeriod (start is FM and end is TL)<br/>    TL - a phenomenonTime with a TimePeriod (start is beginning of forecast validity and end is TL)<br/>    FM - a phenomenonTime with a TimePeriod (start is FM and end is end of forecast validity)<br/>    AT - a phenomenonTime with a TimeInstant<br/><br/>Design note:<br/>These values represent the operationally-representable types, but are not very general-purpose.  Especially with temporary conditions and probability it might be better to turn these into a "probability" property and constraints could be applied to the value to match operational constraints<br/>