Messages between objects are represented by arrows that point from sender object to the receiver object.Įverything in an object-oriented system is accomplished by objects. Each object also has its timeline represented by a dashed line below the object. Often, an anonymous object (:Account) may be used to represent any object in the class. Object names can be specific (e.g., myAccount) or they can be general (e.g., myAccount :Account). These indicate the existence of the object. A lifeline is represented by dashed vertical line drawn below each object. LifelineĮntities of participants in a collaboration (scenario) are written horizontally across the top of the diagram. The three ways of naming an object are shown in Figure below. An object can be named in one of three ways: the object name, the object name and its class, or just the class name (anonymous object). Moreover, you can export diagrams to image files supporting PNG, JPG, and SVG.In the UML, an object in a sequence diagram is drawn as a rectangle containing the name of the object, underlined. In addition to that, it comes with pre-designed templates that allow you to create sequence diagrams, flowcharts, and other types of UML diagrams in no time. Since this program is web-based, you don’t need any installation and proceed immediately in creation.

GitMind is a free and online diagramming tool that allows users to design and structure any type of diagram. Hereto, we’ll be sharing with you the best free online sequence diagram tools you can use to create this diagram.

Understanding the requirements of a new system can be realized through this tool. In particular, it displays the interactions of objects with each other, the exchanging of messages between them, and event scenarios in the order they take place. This lets you see a system in a logical view by means of graphical figures. A sequence diagram is a type of UML diagram that is used to model scenarios happening on a certain process.

Sequence diagram online creator