There is no «port» stereotype keyword for Port or Property in UML-2.5.1 or SysML-1.6. It is assumed to be introduced in some SysML and SysPhS specification diagrams as a custom or user-defined stereotype for special illustration purposes.

This page identifies a possible issue, inconsistency, concern, error, or bug!
One of the ways Webel IT Australia helps promote tools, technologies, and languages is by donating a lot of time identifying, tracking, and reporting potential issues, in order to help vendors and developers improve the tools and technologies. In some cases, we also offer workarounds and advice for users. All issues tracked on our public site are offered most constructively and with sincerest gratitude to the tool vendors and technology developers.
Icon class
icon_class
far fa-sticky-note
icon_class_computed
far fa-sticky-note
Note kind
Policy level
Specification keywords
UML keywords
SysMLv1.x keywords
Keywords
Click on the image to view it full size
To understand this concern fully it helps if you first understand this tool feature: The diagram shown also employs this power display feature:

The concern is that an apparently user-defined or custom stereotype keyword «port» appears in some diagrams for the SysML and SysPhS specifications, even though no such stereotype keyword officially exists in UML-2.5.1 or SysML-1.6 (not even non-normative). This can be confusing for those not fully familiar with the underlying metamodel machinery, and I've seen a lot of people redundantly copying the practice.

For example, in SysML-1.6:

In the SysPhS-1.1 spec the keyword «port» appears in some diagrams but not in the body text.

The only justification for it might be to distinguish between a Property as an Association end and a Port as an Association end in "associative" modelling in Class Diagrams or Block Definitions Diagrams (for special educational or illustrative purposes), but typically naming is sufficient for that anyway, and Ports can always be simply listed in compartments.


What can make it even more confusing is that SysML-1.6 DOES support special stereotype keywords for the extending stereotypes ProxyPort «proxy» and FullPort «full». Note however that these have not always been popular with some users:

Relates to
Related notes
Related notes (backlinks)
Related snippets (extracts)
Visit also
Visit also (backlinks)