Chapter 10 : Activity Diagram. An activity diagram shows a decision. \\Kbrown\Kathys g\Document\FHelp\GDPro\GDPro5.0\5.0 PDF Manuals\Windows Documents\UML.
. of which there can be only one on an activity diagram, final state symbols can represent the. UML Basics Part II: The Activity Diagram Subject: from The. The Activity Diagram can help to. An activity specifies the. Definition of notations is quoted from Object Management Group Unified Modeling Language.
Object Management Group (OMG) provides the newest UML standards, add-ons and features on their site. Activity diagram UML 1.x Activity. Behavioral UML diagrams; Activity diagram. the join and split symbols in activity diagrams only resolve this for simple. Although UML activity diagrams could. UML activity diagram for. and System although it is also common to put actor symbols (stick figures) to. UML Activity Diagrams: Reference. UML Activity Diagram. The diagram that displays an Activity. To see its properties, click an empty part of the diagram. Note. Unified Modeling Language (UML) Activity Diagrams. The main element of an activity diagram is the activity itself. PDF. Next Page.
UML Activity Diagrams: Guidelines. Visual Studio 2015 Other Versions Visual Studio 2013; Visual Studio 2012; Visual. Under Templates, click UML Activity Diagram.
UML Activity Diagrams: Guidelines. Most control flows carry data. For example, the output flow from the "Customer provides details" action carries a reference to the shipping address.
If you want to describe that data on your diagram, you can replace a connector with an object node and two connectors as shown in the following figure. Notice that the round- cornered rectangles, such as Dispatch Goods, represent actions, where processing occurs. The square- cornered rectangles, such as Shipment Address, represent a flow of objects from one action to another. Give the object node a name that reflects the role of the node as a conduit or buffer of the objects that flow between the actions. You can set the Type of the object node in the Properties window.
The type can be a primitive type such as Integer, or a class, interface, or enumeration that you have defined in a class diagram. For example, you could create a class Shipment Address, with attributes of Street Address, City, and so on, together with an association to another class that is named Customer. For more information, see UML Class Diagrams: Guidelines. Note If you type the name of a type that has not yet been defined, an item will be added under Unspecified Types in UML Model Explorer. If you subsequently define a type of that name in a class diagram, you should reset the type of the object node so that it refers to the new type.
Sparx Systems - UML 2 Tutorial. Activity Diagrams. In UML, an activity diagram is used to display the sequence of activities. Activity diagrams show the workflow from a start point to the finish point detailing the many decision paths that exist in the progression of events contained in the activity. They may be used to detail situations where parallel processing may occur in the execution of some activities.
Activity diagrams are useful for business modelling where they are used for detailing the processes involved in business activities. An Example of an activity diagram is shown below. The following sections describe the elements that constitute an activity diagram. Activities. An activity is the specification of a parameterized sequence of behaviour. An activity is shown as a round- cornered rectangle enclosing all the actions, control flows and other elements that make up the activity.
Actions. An action represents a single step within an activity. Actions are denoted by round- cornered rectangles. Action Constraints.
Constraints can be attached to an action. The following diagram shows an action with local pre- and post- conditions. Control Flow. A control flow shows the flow of control from one action to the next. Its notation is a line with an arrowhead.
Initial Node. An initial or start node is depicted by a large black spot, as shown below. Final Node. There are two types of final node: activity and flow final nodes.
The activity final node is depicted as a circle with a dot inside. The flow final node is depicted as a circle with a cross inside.
The difference between the two node types is that the flow final node denotes the end of a single control flow; the activity final node denotes the end of all control flows within the activity. Objects and Object Flows. An object flow is a path along which objects or data can pass. An object is shown as a rectangle. An object flow is shown as a connector with an arrowhead denoting the direction the object is being passed. An object flow must have an object on at least one of its ends.
A shorthand notation for the above diagram would be to use input and output pins. A data store is shown as an object with the «datastore» keyword.
Decision and Merge Nodes. Decision nodes and merge nodes have the same notation: a diamond shape. They can both be named. The control flows coming away from a decision node will have guard conditions which will allow control to flow if the guard condition is met. The following diagram shows use of a decision node and a merge node. Fork and Join Nodes. Forks and joins have the same notation: either a horizontal or vertical bar (the orientation is dependent on whether the control flow is running left to right or top to bottom).
They indicate the start and end of concurrent threads of control. The following diagram shows an example of their use. A join is different from a merge in that the join synchronizes two inflows and produces a single outflow. The outflow from a join cannot execute until all inflows have been received. A merge passes any control flows straight through it. If two or more inflows are received by a merge symbol, the action pointed to by its outflow is executed two or more times. Expansion Region.
An expansion region is a structured activity region that executes multiple times. Input and output expansion nodes are drawn as a group of three boxes representing a multiple selection of items.
The keyword "iterative", "parallel" or "stream" is shown in the top left corner of the region. Exception Handlers.
Exception Handlers can be modelled on activity diagrams as in the example below. Interruptible Activity Region.
An interruptible activity region surrounds a group of actions that can be interrupted. In the very simple example below, the "Process Order" action will execute until completion, when it will pass control to the "Close Order" action, unless a "Cancel Request" interrupt is received, which will pass control to the "Cancel Order" action. Partition. An activity partition is shown as either a horizontal or vertical swimlane. In the following diagram, the partitions are used to separate actions within an activity into those performed by the accounting department and those performed by the customer.