entity
physical
abstract
quantity
number
physical quantity
constant quantity
function quantity
unary constant functionquantity
ampere
candela
newton
pascal
joule
watt
volt
farad
ohm
siemens
weber
tesla
henry
lumen
lux
gray
sievert
electron volt
pound force
calorie
british thermal unit
unit of measure
attribute
set or class
relation
proposition
graph
graph element