SysML2.0: Webel: Suggest it needs to be clarified whether a regular connection (that is not an interface) may be used between ports.

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Note kind

ISSUE

PROPOSAL

Policy level

PROPOSED

Specification keywords

SysMLv2

SysMLv2 keywords

Keywords

The following state that where an interface connection is used it must be between ports:

SysML2.0: 'An interface definition is a kind of connection definition ... whose ends are restricted to be port definitions ... An interface usage is a kind of connection that is usage of an interface definition. The ends of an interface usage are restricted to be port usages.'

SysML2.0: 'An interface is simply a connection all of whose ends are ports. As such, an interface facilitates the specification and reuse of compatible connections between parts.'

But the above DO NOT alone state that a regular connection (one that is not an interface) CANNOT also (instead of an interface) be used between ports.

Example: The following SysMLv2 PILOT GitHub sample has regular connections for sub-connections of a structured interface definition:

11. Interfaces: Interface Decomposition Example.sysml

In any case, Webel recommends that a basic connection usage NOT be used between ports. Prefer always use an interface usage.

Relates to

11. Interfaces: Interface Decomposition Example.sysml

Related notes

Related notes (backlinks)

Related snippets (extracts)

[SysMLv2] An interface definition is a kind of connection definition ... whose ends are restricted to be port definitions ...

[SysMLv2] An interface usage is a kind of connection that is usage of an interface definition. The ends of an interface usage are restricted to be port usages.

[SysMLv2] An interface is simply a connection all of whose ends are ports. As such, an interface facilitates the specification and reuse of compatible connections between parts.

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