MetOffice 2 DAML mapping

Each symbol in the MetOffice report is represented as WeatherEvent(s) in the ontology
Temperature maps to TemperatureEvents.

Notes:

• The night icons are never used by the MetOffice.
  And there is no way of representing "night" in Metar.
• For showers we do not specify cloud layers as it would change rapidly over time
• Due to the "lower resolution" of the metOffice cloud-layers we have chosen to map the white cloud icon to ScatteredCloudLayer, and the black cloud icon to BrokenCloudLayer, this assigning some semantics to the icons
• The OvercastCloudLayer is only used when the word storm is mentioned in the description.

Symbol	Description	Class [Qualifiers]
	Clear Sky (night)	ClearSkiesSKC
	Sunny	---- "" ----
	Partly cloudy (night)	FewCloudLayer
	Sunny Intervals	---- "" ----
	Dust	Duststorm
	Mist	Mist
	Fog	Fog
	Medium-level Cloud	ScatteredCloudLayer
	Low-level cloud	BrokenCloudLayer
	Light rain shower (n)	Rain [Showers, Light]
	Light rain shower	---- "" ----
	Drizzle	Drizzle, ScatteredCloudLayer
	Light rain	Rain [Light], ScatteredCloudLayer
	Heavy rain shower (n)	Rain [Showers, Heavy]
	Heavy rain shower	---- "" ----
	Heavy rain	Rain [Heavy], BrokenCloudLayer
	Sleet shower (n)	Rain [Showers], Snow [Showers]
	Sleet shower	---- "" ----
	Sleet	Rain [Medium],Snow [Medium], BrokenCloudLayer
	Hail shower (n)	Hail [Shower]
	Hail shower	---- "" ----
	Hail	Hail, BrokenCloudLayer
	Light snow shower (n)	Snow [Showers, Light]
	Light snow shower	---- "" ----
	Light snow	Snow [Light], BrokenCloudLayer
	Heavy snow shower (n)	Snow [Showers, Heavy]
	Heavy snow shower	---- "" ----
	Heavy snow	Snow [Heavy], BrokenCloudLayer
	Thundery shower (n)	Rain [Showers, Thunderstorm]
	Thundery shower	---- "" ----
	Thundery storm	Rain [Heavy, Thunderstorm], OvercastCloudLayer
	Tropical storm	Rain [Heavy], OvercastCloudLayer

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