Table 1 A FoodOn food source term like ‘apple tree food source’ is positioned as a subclass of a common language named food groups like ‘pome fruit plant food source’, and is often qualified by at least one biological taxonomic identifier

Apple tree as food source

subClassOf 'pome fruit plant food source' and ‘has taxonomic identifier’ some ‘Malus pumila’ and ‘has taxonomic identifier’ only ‘Malus pumila’

Allows for subclasses of apple tree like honeycrisp (Malus pumila 'Honeycrisp') to be added which identify organism varieties.

European anchovy as food source

subClassOf ‘anchovy food source’ and ‘has taxonomic identifier’ some ‘Engraulis encrasicolus’ and ‘has taxonomic identifier’ only ‘Engraulis encrasicolus’

‘Anchovy food source’ is a FoodOn class of 13 different species of fish from around the world, one of which is the european anchovy, which has an NCBITaxon species of ‘Engraulis encrasicolus’.

Cricket as food source

subClassOf ‘insect food source’ and ‘has taxonomic identifier’ only (‘Acheta domesticus’ or ‘Gryllus Bimaculatus’) and ‘has taxonomic identifier’ some (‘Acheta domesticus’ or ‘Gryllus Bimaculatus’)

Crickets are considered a food source only in the case where instances are one of the given species. Other commonly edible species of cricket can be added to this definition over time.