What is object flow in activity diagram?
The object flow describes the flow of objects and data within activities. Edges can be labeled with a name (close to the arrow): The object flow in an activity diagram shows the path of one or more business objects between the various activities.
What are the symbols for the activity diagram?
Activity Diagram Symbols
|Control Flow / Edge||Used to represent the flow of control from one action to the other|
|Object Flow / Control Edge||Used to represent the path of objects moving through the activity|
|Activity Final Node||Used to mark the end of all control flows within the activity|
What is activity state in activity diagram?
Action or Activity State – An activity represents execution of an action on objects or by objects. We represent an activity using a rectangle with rounded corners. Basically any action or event that takes place is represented using an activity.
What symbol do you use to indicate a choice in an activity diagram?
Decisions and Branching A diamond represents a decision with alternate paths. When an activity requires a decision prior to moving on to the next activity, add a diamond between the two activities. The outgoing alternates should be labeled with a condition or guard expression.
What is object flow in UML?
In UML Activity Diagrams. Control Flow shows the flow of control from one action to the next. and. Object flow is a path along which objects or data can pass.
What is an object diagram in UML?
What is an object diagram in UML? A UML object diagram represents a specific instance of a class diagram at a certain moment in time. When represented visually, you’ll see many similarities to the class diagram. An object diagram focuses on the attributes of a set of objects and how those objects relate to each other.
What is object node in activity diagram?
In activity diagrams, an object node is an abstract activity node that helps to define the object flow in an activity. An object node indicates that an instance of a classifier might be available at a particular point in the activity.
What is fork in activity diagram?
A Fork notation in a UML Activity Diagram is a control node that splits a flow into multiple concurrent flows. This will have one incoming edge and multiple outgoing edges. A join node is a control node that synchronizes multiple flows. This will have multiple incoming edges and one outgoing edge.
What is an object flow in activity diagrams?
When used in an Activity diagram, an Object Flow connects two elements, with specific data passing through it, modeling an active transition. To view sample Activity diagrams using Object Flows, see the Object Flows in Activity Diagrams topic.
What is the action state of the activity diagram?
A small filled circle followed by an arrow represents the initial action state or the start point for any activity diagram. For activity diagram using swimlanes, make sure the start point is placed in the top left corner of the first column. An action state represents the non-interruptible action of objects.
What are the symbols in an activity diagram?
Basic Activity Diagram Notations and Symbols. 1 Initial State or Start Point. A small filled circle followed by an arrow represents the initial action state or the start point for any activity 2 Activity or Action State. 3 Action Flow. 4 Object Flow. 5 Decisions and Branching.
What is an object flow in Statemachine?
In StateMachine diagrams, an Object Flow is a specification of a state flow or transition. It implies the passing of an Object instance between elements at run-time. You can insert an Object Flow from the ‘State’ or ‘Activity’ pages of the Toolbox, or from the drop-down list of all relationships located in the header toolbar.