The Initial State from the UML Activity Diagram marks the entry point and the initial Activity State. For objects, this could be the state when instantiated. The Initial State from the UML Statechart Diagram is the state of an object before any transitions. Message Arrow in the UML Collaboration Diagram shows the interaction between the commencing object and the destination object. It starts when the message is received and ends when the object is done handling the message. These are also called the method-invocation boxes, and indicate that an object is responding to a message. ActivationĪctivation elements in the UML Sequence Diagram are boxes on the lifelines. Note: This element should not be mistaken with the Class element which is divided into three parts. The top part contains the name of the object, while the second part contains the attributes of the object. The object element from the UML Object Diagram is a rectangle divided into two parts. This object’s name is usually underlined. The simple object from the UML Object Diagram is a rectangle that displays the object name. Note that the actors in the system are outside the system. Anything within the box represents functionality that is in scope and anything outside is not. SystemĪ system in a UML Use Case Diagram is a rectangle spanning all the use cases in the system that defines the scope of your system. Here is an overview of all the nine different kinds of Modeling diagram objects that are wrapped under the heading of the UML.Īll these UML diagram objects are available in Creately and you can try out a demo or take a look at some sample UML Diagrams for more context.

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