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In any case, since the requirement verification usage itself is a subrequirement, it is automatically considered a required constraint of its containing objective.

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OMG Systems Modeling Language TM (SysML®) Version 2.0 formal/2025-09-03 (Sep 2025)
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About Object Management Group copyright in text extracts quoted from OMG specifications for educational purposes
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As for an assumed or required constraint, the keyword verify can be used rather than verify requirement to declare a verified requirement using reference subsetting.
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In any case, since the requirement verification usage itself is a subrequirement, it is automatically considered a required constraint of its containing objective
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In addition, its subject is bound by default to the subject of the objective, which is itself bound to the subject of the verification case.
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The result of a verification case is a verdict that can have the values pass, fail, inconclusive, or error.
In simple cases, the PassIf calculation definition from the VerificationCases library model ... can be used to obtain a pass or fail verdict based on a Boolean value.
In addition to assumed and required constraint usages allowed in any requirement usage ... the objective of a verification case may also have requirement verification usages, which indicate the requirements to be verified by the verification case.
A requirement verification usage is a subrequirement of the objective that is indicated by prefixing a requirement usage declaration with the keyword verify.
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