Measurement unit
type: Class
comment: This class represents a specific list of measurement unit, e.g. kg, g, mm, cm etc.

Quantitative value
type: Class
subclass of: Restriction
  all values from: Measurement unit
  on property: has measurement unit

has measurement unit
type: FunctionalProperty
range: Measurement unit
type: ObjectProperty

Interval
type: Class
subclass of: Restriction
  all values from: Literal
  on property: valueMin
subclass of: Restriction
  all values from: Literal
  on property: valueMax
subclass of: Restriction
  all values from: boolean
  on property: includingMinValue
subclass of: Restriction
  all values from: boolean
  on property: includingMaxValue
subclass of: Restriction
  all values from: Measurement unit
  on property: has measurement unit

unit symbol
type: FunctionalProperty
range: string
domain: Measurement unit
type: DatatypeProperty