Feature

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A capability provided by a system to it users.

Unpleasant experience, as used sarcastically in the statement: ?It?s a feature?. From the adage "It's not a bug, it's a feature."

An externally observable service provided by the system which directly fulfills a stakeholder need.

A property, like operation or attribute, which is encapsulated within a classifier, such as an interface, a class or a datatype.

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