This section of the trail shows you how the SysML-1.6/1.7 conjugation approach works, and how to handle it in the latest versions of the MagicDraw/Cameo tool:

UML Port conjugation is dead (since SysML-1.6); Long live conjugation of the Port's type!

Since SysML-1.6 use of direct UML conjugation of Ports is NOT supported; If you are using InterfaceBlocks use instead a conjugated ~InterfaceBlock type!

The mechanism for conjugated Ports has been changed in SysML 1.6, it now conjugates the Type! If you are using an InterfaceBlock to type a Port you can conjugate that 'original' on another Port by typing it with an ~InterfaceBlock.

SysML-1.6: 'The ~InterfaceBlock stereotype (shall be pronounced: "conjugated interface block") is a specialization of InterfaceBlock that has the same features as its original InterfaceBlock except that its DirectedFeatures and FlowProperties are reversed (conjugated'

SysML-1.6: 'InterfaceBlock ... for example, in flow properties are conjugated as out flow properties and provided features are conjugated as required features. '

SysML-1.6: 'Conjugation is specified by a constraint giving the features of ~InterfaceBlocks according to those of their original InterfaceBlocks ... It is expected that tools conforming to this specification automatically create features of ~InterfaceBlocks.'

Webel: SysML1.7: Port contract matching is Feature-based, not Type-based. There's nothing particularly magical or special about use of an ~InterfaceBlock on a "conjugating" SysML Port, it's just a convenient way of managing one-to-one Feature matching!

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Conjugation in SysML-1.7 is Type-based: InterfaceBlock, ~InterfaceBlock, and DirectedFeature

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Conjugation in SysML-1.7 is Type-based: InterfaceBlock, ~InterfaceBlock, and DirectedFeature

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09:04: Ports and contracts

Visit also (backlinks)

SysMLv1: Summary of some important changes between SysMLv1.2 and SysMLv1.7 and some DEPRECATED modelling elements [PARTIAL LIST ONLY]

Webel: SysML1.7: Port contract matching is Feature-based, not Type-based. There's nothing particularly magical or special about use of an ~InterfaceBlock on a "conjugating" SysML Port, it's just a convenient way of managing one-to-one Feature matching!

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