A DirectedFeature has the same notation as other non-flow properties and behavioral features with a feature direction prefix (prov | reqd | provreqd), which corresponds to one the FeatureDirectionKind literals “provided,” “required,” and “providedrequired

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In general, the SysML DirectedFeature approach is more powerful and the notation is cleaner than UML provided/required Interfaces. Prefer SysML DirectedFeatures unless you have a really good reason to use Interfaces!
Hybrid SUV example: provided/required DirectedFeatures (Block Definition Diagram)
Hybrid SUV example: provided/required DirectedFeatures (Internal Definition Diagram)
UML provided/required Interfaces vs SysML DirectedFeatures on Ports
Source
OMG Systems Modeling Language (SysML) 1.7beta1
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About Object Management Group copyright in text extracts quoted from OMG specifications for educational purposes
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NOTATION
SysML keywords
DirectedFeature
DirectedFeature::featureDirection
FeatureDirectionKind
FeatureDirectionKind::provided
FeatureDirectionKind::providedrequired
FeatureDirectionKind::required
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A DirectedFeature has the same notation as other non-flow properties and behavioral features with a feature direction prefix (prov | reqd | provreqd), which corresponds to one [of] the FeatureDirectionKind literals “provided,” “required,” and “providedrequired,” respectively.
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Directed features can appear in compartments for the various kinds of properties and behavioral features.
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[SysML1.6: PREFER SysML1.7] A DirectedFeature indicates whether the feature is supported by the owning block (provided), or is to be supported by other blocks for the owning block to use (required), or both ...
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Directed features can appear in compartments for the various kinds of properties and behavioral features.
Features that are not denoted as a DirectedFeature are implicitly provided features. As such they can be matched against a corresponding required feature.
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