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Dec 12, 2022 · A lifeline notation with an actor element symbol is used when the particular sequence diagram is owned by a use case. A lifeline with an entity element represents system data. For example, in a customer service application, the Customer entity would manage all data related to a customer.
Oct 10, 2024 · A lifeline is a named element which depicts an individual participant in a sequence diagram. So basically each instance in a sequence diagram is represented by a lifeline. Lifeline elements are located at the top in a sequence diagram.
The following nodes and edges are typically drawn in a UML sequence diagram: lifeline, execution specification, message, combined fragment, interaction use, state invariant, continuation, destruction occurrence. Major elements of the sequence diagram are shown on the picture below.
Oct 9, 2023 · When drawing a sequence diagram, lifeline notation elements are placed across the top of the diagram. Lifelines represent either roles or object instances that participate in the sequence being modeled.
Lifeline with name "data" of class Stock. A Lifeline is shown using a symbol that consists of a rectangle forming its “head” followed by a vertical line (which may be dashed) that represents the lifetime of the participant.
NotationDescriptionLifeline with name "data" of class Stock.A Lifeline is shown using a symbol that ...Anonymous lifeline of class User.Anonymous lifeline has no name - ...Lifeline "x" of class X is selected with ...Selector could be used to specify some ...Execution specification shown as grey ...Execution (full name - execution ...Oct 13, 2023 · Notation Description: A thin rectangle on a lifeline represents the period during which an element is performing an operation. The top and bottom of the rectangle align with the initiation and completion time, respectively.
When drawing a sequence diagram, lifeline notation elements are placed across the top of the diagram. Lifelines represent either roles or object instances that participate in the sequence being modeled. [Note: In fully modeled systems the objects (instances of classes) will also be modeled on a system's class diagram.]
