Learn about Webel's comprehensive SysMLv2 Workshop Seminar course!
VIDEO: The Webel SysMLv2/MBSE course has landed! Take a quick tour!
Webel now has a SysMLv2 Online Self-Study course with self-test Quizzes!

Mass Roll-up Example: MassConstraintExample.sysml

Gallery
Tutorial
TRAIL: The SysML-v2-Pilot-Implementation GitHub samples in Cameo by Webel
Section
examples
Offered by Webel free to the SysML community with thanks to the contributors of the SysMLv2 GitHub code examples. All diagram images remain © Copyright Webel IT Australia 2026. Copyright in the linked GitHub source code remains with the OMG. So-called "AI" and Machine Learning training systems DO NOT have permission to use (scrape and steal) this resource! Other training organisations DO NOT have permission to use these images in their own training.
Members of the OMG Systems Modeling Community (SMC) are welcome to use these images with full attribution to Webel IT Australia in presentations and non-commercial activities of the SMC – please unedited and using full resolution downloads (click on image first then Save As).
This slide trail is NOT a SysMLv2 language tutorial! Slides here are offered as is (some without further explanations) in the hope they may be of interest. To learn SysMLv2 attend the Webel SysMLv2 Seminar Workshop group course. Individuals may instead purchase access to the Webel SysMLv2 Online self-study eLearning course with self-test Quizzes to learn at their own pace.
Topic level
ESSENTIAL
Keywords
Click on the image to view it full size
Modelling and style
Webel: SysMLv2: Cameo: Modelling Best Practice: For non-structured features prefer compartment views with feature values over symbols UNLESS you need to show relationships from feature symbols OR have special reasons (such as educational illustration).
Webel: SysMLv2: Cameo: Modelling Best Practice: For parameters prefer compartment view (where available) over boundary symbols UNLESS you need to show relationships from the symbols OR have special reasons (such as educational illustration).
Webel: SysMLv2: Cameo: TIP: You can move parameter symbols (the little boxes with arrows) around the boundary of their owner's symbol to save space and improve readability. Parameters displayed on the left (default Cameo layout) take up a lot of space.
Webel Best Practice: SysMLv2: Cameo: TIP: Show EITHER a specialization relationship from a symbol OR show the specialization in the symbol header using Display Styles -> Show Specialization. Prefer NOT show both modes in one View.
Webel: SysMLv2: Cameo: Modelling Best Practice: EITHER display a feature in a compartment (preferred for non-structured) OR display the symbol of the feature (may be necessary if structured) but NOT both.

Note for the «assert» of Vehicle4:

SysML2.0: 'An assert constraint usage may also be declared using just the keyword assert instead of assert constraint. In this case, the declaration does not include either a name or short name for the assert constraint usage. Instead, the constraint to be asserted is identified by giving a qualified name or feature chain immediately after the assert keyword, and it is then related to the assert constraint usage by a reference subsetting relationship ...'

It is not clear why for each of eng:Engine and trans:Transmission the m:mass is redefined if the redefinitions don't have any values.

Up next
Mass Roll-up Example: MassRollup.sysml
Notes
[DISPLAY, MODELLING, TIP, TOOL]{OPTION} Webel: SysMLv2: Cameo: TIP: You can move parameter symbols (the little boxes with arrows) around the boundary of their owner's symbol to save space and improve readability. Parameters displayed on the left (default Cameo layout) take up a lot of space.
[MODELLING, PATTERN, TIP, TOOL]{RECOMMENDED} Webel: SysMLv2: Cameo: Modelling Best Practice: Adopt a tight packing strategy leveraging the Cameo grid (but DO NOT obscure the ends of relationship arrow symbols).
[DISPLAY, MODELLING, TIP, TOOL]{RECOMMENDED} Webel Best Practice: SysMLv2: Cameo: TIP: Show EITHER a specialization relationship from a symbol OR show the specialization in the symbol header using Display Styles -> Show Specialization. Prefer NOT show both modes in one View.
[DISPLAY, MODELLING, TIP, TOOL]{RECOMMENDED} Webel: SysMLv2: Cameo: Modelling Best Practice: For non-structured features prefer compartment views with feature values over symbols UNLESS you need to show relationships from feature symbols OR have special reasons (such as educational illustration).
[DISPLAY, MODELLING, TIP, TOOL]{RECOMMENDED} Webel: SysMLv2: Cameo: Modelling Best Practice: For parameters prefer compartment view (where available) over boundary symbols UNLESS you need to show relationships from the symbols OR have special reasons (such as educational illustration).
[DISPLAY, MODELLING, TIP, TOOL]{RECOMMENDED} Webel: SysMLv2: Cameo: Modelling Best Practice: EITHER display a feature in a compartment (preferred for non-structured) OR display the symbol of the feature (may be necessary if structured) but NOT both.
Snippets (quotes/extracts)
  [SysMLv2] An assert constraint usage may also be declared using just the keyword assert instead of assert constraint. In this case, the declaration does not include either a name or short name for the assert constraint usage.
  [SysMLv2] Instead, the constraint to be asserted is identified by giving a qualified name or feature chain immediately after the assert keyword, and it is then related to the assert constraint usage by a reference subsetting relationship ...
Related slides (includes other tutorials)
Related slides (backlinks, includes other tutorials)
Mass Roll-up Example: MassRollup.sysml
Visit also
Visit also (backlinks)
External links
Source on GitHub