An operation is an indication of how many objects participate in a given relationship.

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An operation is a method or action that can be performed on an object or a set of objects. It is not used to indicate the number of objects participating in a relationship. The number of objects participating in a relationship is determined by the cardinality of the relationship, which is often represented by symbols or notation such as "1-to-1", "1-to-many", or "many-to-many".

An Operation Is an Indication of How Many Objects Participate