#UML SEQUENCE DIAGRAM IF STATEMET SOFTWARE#
#UML SEQUENCE DIAGRAM IF STATEMET SERIES#

Make your own UML sequence diagram with Gleek. Messages can go back and forth from left and right, with the sequence moving from top to bottom as the time period progresses. During this period it is said to have focus of control. An activation bar is a thin rectangular box that is shown on an object’s lifeline when it is active and processing a task. Horizontal arrows show the messages exchanged between the objects. This lifeline represents the object’s existence in the time period being captured. The diagram shows how objects in the system exchange messages and which objects are active at any particular time.Įach object is shown at the top of the diagram and each has a lifeline that descends vertically from its center. Sequence diagrams can also be called event diagrams or event scenarios.

#UML SEQUENCE DIAGRAM IF STATEMET SOFTWARE#

UML diagrams are generally used when designing software and databases to make sure that the system will work as required and to reveal potential problems before building the final product.Ī sequence diagram models the interactions between objects in a system in sequential order over time. Sequence diagrams are one of the 14 diagram types that can be created using the Unified Modeling Language (UML). You can use an Interaction element to insert an Interaction diagram as a child of a Class element.What are sequence diagrams and what are they used for? The State/Continuation element serves two different purposes for Sequence diagrams, as State Invariants and Continuations. This example Sequence diagram demonstrates several different elements.Īn 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. You generate Sequence diagram elements and connectors from the 'Interaction' pages of the Toolbox. To toggle the numbering of messages on a Sequence diagram, select or deselect the 'Show Sequence Numbering' checkbox on the 'Preferences' dialog.

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.

#UML SEQUENCE DIAGRAM IF STATEMET SERIES#

A Sequence diagram is a structured representation of behavior as a series of sequential steps over time.

Uml sequence diagram if statemet