In this post we discuss Sequence Diagrams.
#Sequence diagram using staruml software#
Unified Modelling Language (UML) is a modeling language in the field of software engineering which aims to set standard ways to visualize the design of a system. UML guides the creation of multiple types of diagrams such as interaction, structure and behaviour diagrams. A sequence diagram is the most commonly used interaction diagram. Interaction diagram – An interaction diagram is used to show the interactive behavior of a system. Since visualizing the interactions in a system can be a cumbersome task, we use different types of interaction diagrams to capture various features and aspects of interaction in a system. Sequence Diagrams – A sequence diagram simply depicts interaction between objects in a sequential order i.e. the order in which these interactions take place.Class Diagram is a visual expression of various static relations of class-related elements. Class Diagram can contain not only classes but also interfaces, enumerations, packages, various relations, instances, and their links. Use Case Diagram is an expression of relations between the use cases in a specific system or object and the external actors. Use Case expresses the functions of the system and how the system functions interact with the external actors.
Sequence Diagram expresses the interactions of instances. It is a direct expression of the InteractionInstanceSet, which is a set of the stimuli exchanged between the instances within a CollaborationInstanceSet. While Sequence Role Diagram is a ClassifierRole-oriented expression, Sequence Diagram is an Instance-oriented expression. Sequence Role Diagram expresses the interactions of the role concepts. It is a direct expression of the Interaction, which is a set of the messages exchanged between the ClassifierRoles within a Collaboration. While Sequence Diagram is an Instance-oriented expression, Sequence Role Diagram is a ClassifierRole-oriented expression.Ĭollaboration Diagram expresses the collaboration between instances. It is a direct expression of the collaboration model of the instances within a CollaborationInstanceSet. While Collaboration Role Diagram is a ClassifierRole-oriented expression, Collaboration Diagram is an Instance-oriented expression.Ĭollaboration Role Diagram expresses the collaboration between the role concepts. It is a direct expression of the collaboration model of the ClassifierRoles within a Collaboration. While Collaboration Diagram is an Instance-oriented expression, Collaboration Role Diagram is a ClassifierRole-oriented expression. Statechart Diagram expresses the static behaviors of a specific object through states and their transitions. Although Statechart Diagram is generally used to express the behaviors for instances of classes, it can also be used to express behaviors of other elements.Īctivity Diagram is a special form of Statechart Diagram that is suitable for expressing the activity execution flow. Activity Diagram is commonly used for expressing workflow, and it is frequently used for objects like classes, packages, and operations.Ĭomponent Diagram expresses the dependency between the software components.
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