entity
physical
abstract
quantity
attribute
set or class
relation
single valued relation
total valued relation
partial valued relation
binary relation
probability relation
spatial relation
temporal relation
time
begin fn
end fn
finishes
before or equal
temporally between or equal
overlaps temporally
meets temporally
earlier
cooccur
time interval fn
recurrent time interval fn
when fn
past fn
immediate past fn
future fn
immediate future fn
year fn
month fn
day fn
hour fn
minute fn
second fn
temporal composition fn
relative time fn
ternary relation
quaternary relation
quintary relation
list
predicate
variable arity relation
relation extended to quantities
proposition
graph
graph element