What is ref in UML?

To reference other interactions in a UML sequence diagram, interaction uses can be used. It is shown in the sequence diagram as a fragment with the operator ref to indicate the reference to another interaction.

What is ALT in UML?

alt is used to describe alternative scenarios of a workflow. Only one of the options will be executed. opt is used to describe optional step in workflow. For example, for online shop purchase sequence diagram you may use opt to describe how user can add gift wrapping if she wishes.

What is UML Design?

What are UML diagrams? UML, which stands for Unified Modeling Language, is a way to visually represent the architecture, design, and implementation of complex software systems.

What are the action labels used in UML?

Labels on pins for call actions can use the full UML syntax for parameters as they appear in classes, which includes the parameter name, type, direction, and so on. For example, the pin for the mail on Deliver Mail could be labeled as “in m : Mail”.

What is sequence fragment?

Sequence Fragments A combined fragment consists of one or more interaction operands, and each of these encloses one or more messages, interaction uses, or combined fragments. A sequence fragment is represented as a box called a combined fragment, which encloses a portion of the interactions within a sequence diagram.

Is there a UML reference in Visual Studio?

Visual Studio UML Reference. It includes activity, component, class, sequence and use case diagrams (menu on the left). The only thing that should be improved is that the name of the elements is not shown directly in the diagram but explained in tables below.

What is the UML symbol used for?

Any kind of information that isn’t easily representable in UML, including comments, implementation-level code, etc. Also used for a long constraint. This symbol is used in all of the UML diagrams. Group together functionally-similar classes. Same as C++ namespace . identifies derivation.

Is there a cheat sheet for UML diagrams?

UML Diagrams: Detailed overview of all UML diagrams (including the new features of latest UML versions). It’s more a reference guide than a cheatsheet though, since each diagram has its own dedicated page. It is updated to reflect the UML 2.5 version. UML Notation summary for class diagrams and sequence diagrams.

What is the correct notation for interface in UML?

Strict UML uses the «interface» stereotype in the name compartment of a standard class box. A small circle in a corner of the compartment often indicates an interface, as well. If the full interface specification is in some other diagram, I use the “ball” notation or .