You can use an Interaction element to insert an Interaction diagram as a child of a Class element. The State/Continuation element serves two different purposes for Sequence diagrams, as State Invariants and Continuations. Sequence Diagram Element Toolbox IconsĪn Actor is a user of the system user can mean a human user, a machine, or even another system or subsystem in the model.Ī Lifeline represents a distinct connectable element and is an individual participant in an interaction.īoundary elements are used in analysis to capture user interactions, screen flows and element interactions.Ī Control organizes and schedules other activities and elements.Īn Entity is a stereotyped Object that models a store or persistence mechanism that captures the information or knowledge in a system.Ī Fragment element can represents iterations or alternative processes in a Sequence diagram.Īn Endpoint is used in Interaction diagrams to reflect a lost or found Message in sequence.Ī Diagram Gate is a simple graphical way to indicate the point at which messages can be transmitted into and out of interaction fragments. This example Sequence diagram demonstrates several different elements. You generate Sequence diagram elements and connectors from the 'Interaction' pages of the Toolbox. If you create a Message without making reference to the target Class operations, no new operation is. To toggle the numbering of messages on a Sequence diagram, select or deselect the 'Show Sequence Numbering' checkbox on the 'Preferences' dialog. The User Guide for Sparx Systems Enterprise Architect. Each element has a dashed stem called a Lifeline, where that element exists and potentially takes part in the interactions.Stereotyped elements, such as Boundary, Control and Entity, can be used to illustrate screens, controllers and database items, respectively.An Actor element can be used to represent the user initiating the flow of events.Messages on a Sequence diagram can be of several types the Messages can also be configured to reflect the operations and properties of the source and target elements (see the Notes in the Message Help topic).Sequence elements are arranged in a horizontal sequence, with Messages passing back and forward between elements.Make explanatory models for Use Case scenarios by creating a Sequence diagram with an Actor and elements involved in the Use Case, you can model the sequence of steps the user and the system undertake to complete the required tasks.
Capture the flow of information and responsibility throughout the system, early in analysis Messages between elements eventually become method calls in the Class model.Depict workflow, Message passing and how elements in general cooperate over time to achieve a result.
#SEQUENCE DIAGRAM IN ENTERPRISE ARCHITECT SERIES#
Fragments can also be added to represent control structures that operate on a group of messages.A Sequence diagram is a structured representation of behavior as a series of sequential steps over time. You can use it to: Depict workflow, Message passing and. It describes one consistent language for specifying, visualizing, constructing and. The order of objects and messages can be altered to make the diagram more readable and notes can be used to explain parts of the diagram. A Sequence diagram is a structured representation of behavior as a series of sequential steps over time. UML, Unified Modeling Language, is a standard notation for the modeling of real-world objects as a first step in developing an object oriented program. The choice will depend on what the modeler wants to represent. MAGICDRAW and CAMEO are trademarks of No Magic, Inc.
The elements that appear in Sequence diagrams can be either Classifiers such as Classes and Components or instances such as Objects and Component Instances. ENTERPRISE ARCHITECT is a trademark of Sparx Systems Pty Ltd. Sequence diagrams can also be created automatically from stack traces as a way of visualizing how a system functions. They are particularly useful when used to describe complex protocols or subsystem interactions that are difficult to understand unless presented graphically.
They are more typically used by technical modelers to depict how messages are passed between application components and interfaces to achieve an outcome. The Sequence diagram can be used to model any set of messages that flow between two or more elements to produce a result.
Ribbon: Design > Diagram > Add > UML Behavioral > Sequenceīrowser window Toolbar : New Diagram icon > UML Behavioral > Sequenceīrowser window context menu | Add Diagram.
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