"""
This class indicates the semantics of the height attribute. It
describes how the reported height (or depth) has been derived.
"""
enum altitudeMeasurementType {
  """
  It is reporting a measurement based on local density (of
  air or water).
  """
  DENSITY
  "It is reporting a measurement based on local gravity."
  GRAVITY
  """
  As reported by the platform's own altimeter (or depth
  sensor). Typically, but not necessarily this is pressure
  related. The precise option rather than this one should be
  reported if known.
  """
  INDICATED
  "It is derived from a pressure sensor."
  PRESSURE
  """
  It is reporting a measurement made relative to the GEOID
  (WGS84) - e.g. using a satellite navigation system.
  """
  RELATIVE_TO_GEOID
  """
  The distance to the ground below (or above for underground
  systems)  is being measured and reported.
  """
  RELATIVE_TO_GROUND
  """
  It is reporting a measurement made relative to mean sea
  level.
  """
  RELATIVE_TO_MSL
}

"""
The accuracy of the platform's own position report.
"""
type ownPositionAccuracyType {
  "Contains the attributes inherited from the parent type."
  navigationAccuracy: navigationAccuracyType!
  """
  The accuracy of the reported position in the chosen
  coordinate system for reporting. This should be the same
  choice as for the position itself.
  """
  position: positionAccuracyCoordinateType!
}

"""
The platform's own position report.
"""
type ownPositionType {
  accuracy: ownPositionAccuracyType!
  """
  Describes the semantics of the position's altitude
  attribute. Optional: omit only if altitude is not reported.
  """
  altitudeKind: altitudeMeasurementType
  """
  The specification of the coordinate system used for
  reporting own position and its accuracy. In most use cases
  Cartesian or WGS84, Earth Referenced choices are expected;
  in some use cases other choices for reporting relative to
  some known datum could be used.
  """
  coordinateSpecification: coordinateSpecificationType!
  "Contains the attributes inherited from the parent type."
  navigationReport: navigationReportType!
  """
  The position of the reporting platform in the chosen
  coordinate system for reporting.
  """
  position: positionCoordinateType!
}

"""
The accuracy of the platform's own velocity report.
"""
type ownVelocityAccuracyType {
  "Contains the attributes inherited from the parent type."
  navigationAccuracy: navigationAccuracyType!
  """
  The accuracy of the reporting platform's velocity with
  reference to the coordinate system used for reporting..
  """
  velocity: velocityAccuracyCoordinateType!
}

"""
The platform's own velocity report.
"""
type ownVelocityType {
  accuracy: ownVelocityAccuracyType!
  """
  The specification of the coordinate system used for
  reporting own velocity and its accuracy. In most use cases
  Cartesian or WGS84, Earth Referenced choices are expected;
  in some use cases other choices for reporting relative to
  some known datum could be used.
  """
  coordinateSpecification: coordinateSpecificationType!
  "The definition of the velocity being measured."
  measurementKind: velocityMeasurementType!
  "Contains the attributes inherited from the parent type."
  navigationReport: navigationReportType!
  """
  The velocity of the reporting platform with reference to
  the chosen coordinate system for reporting.
  """
  velocity: velocityCoordinateType!
}

"""
This class defines what it is that is having its velocity measured.
"""
enum velocityMeasurementType {
  """
  The measurement is of absolute velocity (i.e. relative to
  the Earth).
  """
  ABSOLUTE
  """
  The measurement is of the air in the local environment
  itself (i.e. the wind speed). This is only to be reported
  as a true value; i.e. it is not be based on a pressure-
  based 'indicated' sensor reading for relative air speed
  that isn't corrected for density. 
  """
  AIR
  """
  The measurement is of velocity relative to the environment
  (i.e. water or air) using an indirect approximation such as
  air pressure. 
  """
  RELATIVE_INDICATED
  """
  The measurement is of velocity relative to the environment
  (i.e. water or air) using a method that is not subject to
  systematic approximation error as is the case with
  'Indicated Air Speed' as measured by a pressure sensor.
  """
  RELATIVE_TRUE
  """
  The measurement is of the water current in the local
  environment itself (i.e. the movement of the water).
  """
  WATER
}