Learn about Webel IT's new SysMLv2/MBSE Workshop Seminar course!

VIDEO: The Webel SysMLv2/MBSE course has landed! Take a quick tour!

Alf-1.1

UML/SysML: Cameo Simulation Toolkit 19SP3: GOTCHA/TIP: ConstraintBlock constraints: Not every available constraint language can handle Enumeration literals (if in doubt choose 'English')

UML: Cameo Simulation Toolkit 19SP3: GOTCHA: CreateObjectAction ignores an Artifact as 'classifier' even though Artifact is a Classifier

UML/SysML: Cameo Simulation Toolkit 19SP3: A parent Activity with a DecisionNode that uses a Activity as a decisionInput Behavior terminates immediately after the decisionInput terminates (but OpaqueBehavior works)

UML/SysML: Cameo Simulation Toolkit 19SP3: GOTCHA: Will not evaluate a guard using a token from a decisionInputFlow UNLESS a decisionInput Behaviour is explicitly defined (but Alf does)

Sample problems and example diagrams in graphical language specifications are NOT necessarily indications of how one should model on a real-world project! They often just serve to demonstrate a particular aspect of the specified language.

Not every task in Activity Diagrams is well-suited to graphical modelling; consider using Action Language Helper (ALH) or Action Language for Foundational UML (Alf)

ALL Model-Based Engineering: Just because you can't see a Feature or some other aspect of a SysML (or UML) Element in a tool on a symbol does NOT mean it does not exist in the underlying model (repository)! The model is not just what is DISPLAYED!

Action Language for Foundational UML 1.1

Subscribe to Alf-1.1

We are Australia's Systems Modeling Language (SysML^®) and Model-Based Systems Engineering (MBSE) specialists!

Catch our SysMLv2/MBSE course Early Bird Deal 50% off all courses fully pre-paid by 15th Apr 2026!

Save 30% off Live Online SysML/MBSE web sessions for individuals before 15th Apr 2026!

SysMLv1 slide set PDFs now available for purchase!

Home of the Webel Parsing Analysis recipe for Model-Based Systems Engineering with SysML^®

Visit our Client showcase