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Formalize UML 2 Sequence Diagrams

Formalize UML 2 Sequence Diagrams 2025

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The document presents a formalization of UML 2 sequence diagrams, addressing the limitations of their informal semantics. It introduces 'template semantics' to provide a structured operational semantics for sequence diagrams, enhancing their expressiveness and enabling formal analysis. The paper details the mapping of sequence diagram constructs to hierarchical transition systems (HTSs) and extends composition operators to define complex interactions. This formalization aims to assist practitioners in creating reliable software models and developing analysis tools for high assurance systems.

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What are the roles in a sequence diagram?

A role is sort of like an abstract or generic object. Different concrete objects can be plugged into a role. A lifeline dangles under a role or object. This represents the lifetime of the role or object.

What should be included in a sequence diagram?

Elements of a Sequence Diagram Lifelines. Lifelines represent the participants in the interaction. Actors. Actors are external entities that interact with the system. Messages. Messages represent the communication between lifelines. Activation bars. Gates. Fragments.

What is the difference between actor and lifeline in sequence diagram?

If we want to model an unnamed instance, we follow the same pattern except now the portion of lifelines name is left blank. A lifeline always portrays an object internal to the system whereas actors are used to depict objects external to the system.

What is the actor in a sequence diagram?

Actors may represent roles played by human users, external hardware, or other subjects. Note that an actor does not necessarily represent a specific physical entity but merely a particular facet (i.e., role) of some entity that is relevant to the specification of its associated use cases.

Can there be two actors in sequence diagram?

We can have multiple actors in a sequence diagram. For example Here the user in seat reservation system is shown as an actor where it exists outside the system and is not a part of the system. We display a lifeline in a rectangle called head with its name and type.

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How do you reference another in a UML sequence diagram?

To reference other interactions in a UML sequence diagram, interaction uses can be used. An interaction use is a fragment that uses or calls another interaction. It is shown in the sequence diagram as a fragment with the operator ref to indicate the reference to another interaction.

How do you convert sequence diagram to collaboration diagram?

Lets dive in! Step 1: Open the Sequence Diagram in Visio. Step 2: Select the Sequence Diagram Elements to Convert. Step 3: Right-click and Select Convert to Collaboration Diagram Step 4: Organize the Elements in the Collaboration Diagram. Step 5: Add and Connect Objects in the Collaboration Diagram.

How do you make a UML sequence diagram?

Start a sequence diagram Start Visio. In the Search box, type UML sequence. Select the UML Sequence diagram. In the dialog box, select the blank template or one of the three starter diagrams. Select Create. The diagram opens. On the View tab, make sure the check box next to Connection Points is selected.

Formalize UML 2 Sequence Diagrams 2025

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What are the roles in a sequence diagram?

What should be included in a sequence diagram?

What is the difference between actor and lifeline in sequence diagram?

What is the actor in a sequence diagram?

Can there be two actors in sequence diagram?

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How do you reference another in a UML sequence diagram?

How do you convert sequence diagram to collaboration diagram?

How do you make a UML sequence diagram?

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