What is cardinality?

The Cardinality column in the Resource tables indicates whether a value is required and how many values may be passed.

• 0..1: A value is not required, but if one is passed, only one is allowed.
• 0..*: A value is not required, but you can pass multiple values.
• 1..1: A value is required, and only one is allowed.
• 1..*: At least one value is required, but you can pass multiple values.