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A splayed end meaning many.
Also known as: Entity relationship crow foot, ER cardinality notation, Martin notation
The entity-relationship notation showing cardinality by the shape of a line's end.
Shows how many instances of one entity may relate to another, by the shape of the line's end.
Contexts: Technical drawing, Software
Reads two facts at each end — the inner symbol gives the minimum and the outer gives the maximum — so a circle and a splay together mean zero or many, and reading only one of the pair is the commonest error.
Contexts: Technical drawing, Software
A line ending in a three-pronged splay for many, a short crossing bar for one, and a small circle for zero, the two symbols combining to give a minimum and a maximum.