Esteemed and revered members of the SBO team,
While annotating a epidemiological model I had problems finding an appropriate term for the fraction of infected, vaccinated, resistant and so on individuals in a population. Could this be included somewhere under:
SBO:0000360 - quantity of an entity pool
I would suggest addition of something like (with a better name):
individual fraction of an entity pool : The ratio of a the number of molecules, particles or individuals of an entity to some overall number of molecules, particles or individuals.
and as a child mole fraction of an entity: ratio of the amount of moles of an entity to the total amount of moles in a system
Numerically they should be quite the same.
Maybe this and the mass fraction could go under a fraction branch in which every amount of an entity relative to an overall amount could reside.