One named, cardinality-bound field slot of a record: label of type, occurring [min, max] times (max === null is unbounded).
label
type
[min, max]
max === null
Readonly
The field label.
Maximum occurrence count allowed (null indicates unbounded cardinality).
null
Minimum occurrence count required.
The field's type.
One named, cardinality-bound field slot of a record:
labeloftype, occurring[min, max]times (max === nullis unbounded).