anchor.diff:  
   # Extreme values
   
  -## Retrieve extreme values for the last X days for Y country [/extreme?wmoCountryId={wmoCountryId}&periodInDays={periodInDays}]
  -
  -By default [/extreme] endpoint (without any URL parameters) finds extreme values for the last 7 days and for 91 wmoCountryId (the id of UK). It is also possible to define X period (trough periodInDays URL parameter) and/or Y country (trough wmoCountryId URL parameter).
  +## Retrieve extreme values [/extreme]
  +
  +By default [/extreme] endpoint finds extreme values for the last 7 days and for all UK's stations which are identified by wmoCountryId=91 in Geostation file (the id of UK). Extreme values recalculate every hour.
   
   ### Example
   
  -`https://point-observation.weather.mg/extreme?wmoCountryId=261&periodInDays=90`
  -
  -+ Request extreme temperature data for country with 261 wmo country id (France) for the las 90 days
  +`https://point-observation.weather.mg/extreme`
  +
  ++ Request extreme temperature data for UK for the last 7 days
   
       + Headers
   
  
positive.code: ### Forecasted weather for a given collection of *latitude* and *longitude* pairs, compressed by Point Compression Algorithm [GET]
  
  + Parameters
      + locatedAt: `463pklwwsB4-4jtN81qz8hR` (string, optional) - compressed list of station locations, using Microsoft Point Compression Algorithm, is efficient for up to 400 locations  
      + fields: `dewPointTemperatureInCelsius,visibilityProbabilityLessThan200MeterInPercent,saturationDeficitInHectoPascal` (string, required) - comma separated list of parameters to be contained inside response 
      + validFrom: `2016-12-13T11:00:00Z` (string, optional) - ISO8601 timestamp notation, means incl. this timestamp; always provide a time offset, e.g. 'Z' for UTC; optional: a request may provide correct offset (so that server can convert to UTC).
      + validUntil: `2016-12-13T12:00:00Z` (string, optional) - ISO8601 timestamp notation, means incl. this timestamp; always provide a time offset, e.g. 'Z' for UTC; optional: a request may provide correct offset (so that server can convert to UTC).
      + validPeriod: `PT0S` (string, required) - comma separated list of periods to be retrieved. use iso8601 time duration notation. PT1H refers one hour forecast periods.
  
negative.code: 			"saturationDeficitInHectoPascal" : 6.9,
  			"validFrom" : "2016-12-13T11:00:00Z",
  			"validPeriod" : "PT0S"
  		},
  		{
  			"dewPointTemperatureInCelsius" : 13.6,
  			"visibilityProbabilityLessThan200MeterInPercent" : 0,
  