Multiplicity (UML)

The multiplicity is the number of objects that may be associated with exactly one object of the opposite side.

UML Notation	Meaning
$\ast$	any number of objects (incl. zero)
$1\dots \ast$	at least one object
$1$	exactly one object
$n$	exactly $n$ objects
$a\dots b$	at least $a$ and at most $b$ objects

graph {
	rankdir=LR
	node [shape=rectangle]
	Lecturer--Assignment [taillabel="1" label="issues" headlabel="*"]
}

graph {
	rankdir=LR
	node [shape=rectangle]
	Lecturer--Assignment [taillabel="1..*" label="gives" headlabel="1..*"]
}