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From: Alex Vinokur on 13 Oct 2005 09:03
What is the difference between "uses" and "requires"
stereotypes/relationships in Use Case Diagram and Class Diagram?


--
Alex Vinokur
email: alex DOT vinokur AT gmail DOT com
http://mathforum.org/library/view/10978.html
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From: Mark Woyna on 13 Oct 2005 10:38
I don't believe I've ever seen a <requires> stereotype. The standard
use case association stereotypes are <extend> (replacing <uses>), and
<includes>. Use case generalization is modeled as an inheritence
relationship using a solid line with a open triangular arrow head, and
does not use a stereotype. Extend and include relationships are modeled
as dependency relationships, dashed line with open arrow head.

Perhaps <requires> is a stronger form of <includes> association.
Includes could be interpreted as an optional use of the use case,
whereas requires signifies that the use case is always invoked.

Another possibility is that <requires> is modeling a prerequisite.

Mark

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