def

airQuality

Measurement of contaminants in the air

meta

supertypes

marker

Marker labels a dict with typing information

    quantity

Measurable property of a substance or phenomenon

subtypes

co2

Carbon dioxide level

pm10

Particulate Matter 10

pm25

Particulate Matter 2.5

tvoc

Total volatile organic compound (TVOC)

tags

quantityOf

Associates quantity as measurement of a phenomenon