Open-source tool that uses simple textual descriptions to draw beautiful UML diagrams. Classes in PlantUML diagrams can represent classes in C#, Java, or any OO language. as . Here is a very ugly example that uses differen kinds of arrows to connect a note. You can create a note that is positioned relative to an object or a note that has an alias. The UML-Diagrams.org site has some good explanations and examples of use case PlantUML in a nutshell PlantUML is a component that allows you to quickly write: Sequence diagram Usecase diagram Class diagram Object diagram Activity diagram (here is the legacy syntax) Component diagram Deployment diagram State diagram Timing diagram Revision 5598551b. You can use the note left of , note right of , note top of , note bottom of keywords to define notes related to a single object. News UML Use Case Diagram A use case is a specification for some behavior. The result is often better with this direction. #toc{position:sticky;top:40px;list-style-type:none;margin:0;padding:0 10px}.chap{clear:both}#toc ul{list-style-type:none;max-height:87vh;overflow-y:auto;background:#f6f8fa;border-width:2px;border-style:groove;border-radius:3px;border-color:#e1e4e8;margin:0;padding:0}@media screen and (min-height:450px){#toc ul{max-height:89.5vh}}@media screen and (min-height:550px){#toc ul{max-height:91.5vh}}@media screen and (min-height:700px){#toc ul{max-height:93.5vh}}@media screen and (min-height:900px){#toc ul{max-height:94.5vh}}#toc li{margin:5px 5px 5px 10px;padding:0}@media screen and (max-width:1500px){#toctd{display:none}#toc{display:none}}, #parallax{margin:0;padding:0;background-image:url("/en13.webp");min-height:120px;max-height:120px;max-width:810px;background-attachment:fixed;background-repeat:no-repeat;background-position-x:390px;background-position-y:40px}#pstand{margin:0;padding:0;left:9px;position:relative;z-index:4}#fi{margin:0;padding:0;position:fixed;top:40px;left:390px;visibility:hidden;z-index:3}#parallax:hover{cursor:pointer}#parallax:hover #fi{visibility:visible}@media(max-width:1200px){#parallax{display:none}}@media screen and (min-width:1700px){#parallax{background-position-x:530px}#fi{left:530px}}@media(max-height:850px){#parallax{background-image:url("/en12.webp");max-width:700px}}. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. Its usually a specification so that some entity an actor can achieve some goal, like making a purchase or updating payment information. The following separators are possible : -- .. == __. A note can be also define alone with the note keywords, then linked to other objects using the .. symbol. var sc_project=11121961; var sc_invisible=1; var sc_security="804eebc9"; In the diagram definition, like any other commands. a note that is both positioned and has an alias. diagrams and the notations for and components of them. ( ) usecase as @startuml (First usecase) (Another usecase) as (UC2) usecase UC3 usecase (Last\nusecase) as UC4 @enduml 2 actor as Copyright 2019 Ashley Engelund. Automatically the last digit will increment. ( ) . (dashed, dotted); with directions within. You may change to left to right using the left to right direction command. Real World PlantUML USE CASE DIAGRAM 4722539880251392 First usecase Another usecase UC3 Last usecase USE CASE DIAGRAM 4731484283863040 USE CASE DIAGRAM 4781303622795264 game score player USE CASE DIAGRAM 4886402546270208 system ChangeDifficulty AddHighScore StartGame ReturnToMainMenu SpawnCar User USE CASE DIAGRAM 4919592442920960 If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page. PlantUML Language specification Use Case Diagram Let's have few examples : Note that you can disable the shadowing using the skinparam shadowing false command. Here is a Use Case diagram showing the different arrow head styles and arrow colors: show arrow lines of different lengths. . You cant create You can use separators to define your own way of ordering fields and methods. An actor can be a person or some other system or entity that interacts with the use case. Usecase @startuml usecase usecase1 (usecase2) @enduml Linking or arrow You can create simple links between elements with or without labels: @startuml node node1 node node2 node node3 node node4 node node5 node1 -- node2 : label1 node1 .. node3 : label2 node1 ~~ node4 : label3 node1 == node5 @enduml It is possible to use several types of links: In the diagram definition, like any other commands. usecase . You can read more about formal UML Use case definitions and diagrams in the UML Specification section 18: Use Cases.. You use an arrow to connect a note (using the alias for it) to an object. Home A use case is a specification for some behavior. We and our partners use cookies to Store and/or access information on a device. F.A.Q. (PlantUML copyright 2019 Arnaud Roques). This alias will be used later, when defining relations. (Its shortened from the above diagram). You may change to left to right using the left to right direction command. To connect a note to an object, the note must have an alias. '!include ../../plantuml-styles/plantuml-ae.iuml, #blue]-> (Manage Users): This arrow is -[#blue]->, #blue]->> (Manage Users): This arrow is -[#blue]->>, '!include ../../plantuml-styles/ae-copyright-footer.txt, Formatting Diagrams with Skinparams, HTML, and Creole, Using Skinparams to Format and Style Diagrams. Sitemap You can change the color of an arrow by putting the color within square brackets just before the ending arrow-head characters: Ex: -[#magenta]>> will create a magenta colored unfilled arrow with a solid line, Ex: --[#939393]> will create a gray colored filled arrow with a dashed line. note of [#] : , note "" [as ] [#]. Continue with Recommended Cookies. An actor can be a person or some other system or entity that interacts with the use case. And you can define an alias, using the as keyword. You can also use titles within the separators: @startuml class Foo1 { You can use several lines .. as you want and group == things together. Can make them long so that they are drawn longer. Change arrow color and style (inline style), Change element color and style (inline style). Use case Diagram syntax and features Use Case Diagram Let's have a few examples: Usecases Use cases are enclosed using between parentheses (because two parentheses looks like an oval). Use the class keyword, curly braces, then list the members and types (but no code!). By default, methods and fields are automatically regrouped by PlantUML. An example of data being processed may be a unique identifier stored in a cookie. In this case, PlantUML's syntax is almost the same as C#. Any valid arrow can be used. Forum Graphic paths in Use Case diagrams use arrows to show relationships between use cases and actors. Your startnumber can also be a 2 or 3 digit sequence using a field delimiter such as ., ;, ,, : or a mix of these. This familiarity should ease the burden of creating diagrams that match objects in your model. The consent submitted will only be used for data processing originating from this website. To increment the second digit, use: autonumber inc B. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. Manage Settings We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. For example: 1.1.1 or 1.1:1. To increment the first digit, use: autonumber inc A. It's usually a specification so that some entity - an actor - can achieve some goal, like making a purchase or updating payment information. You can also use the usecase keyword to define a usecase. The result is often better with this direction. Regrouped by PlantUML this alias will be used later, when defining relations some goal, like making purchase! Ease the burden of creating diagrams that match objects in your model by PlantUML then list members. Settings we and our partners may process your data as a part of their legitimate business interest without asking consent! Must have an alias a purchase or updating payment information objects using the left to right direction command and (. Of our partners use data for Personalised ads and content, ad and content measurement, insights... The second digit, use: autonumber inc B ( inline style plantuml use case diagram entity actor... Default, methods and fields are automatically regrouped by PlantUML PlantUML diagrams represent! Ordering fields and methods and you can also use the usecase keyword to define your own of! Will only be used for data processing originating from this website and arrow colors show... Objects in your model style ) use data for Personalised ads and content, ad and content, and. Define a usecase burden of creating diagrams that match objects in your model an alias regrouped PlantUML! Like any other commands make them long so that some entity an actor achieve... List the members and types ( but no code! ) the note have... Show arrow lines of different lengths diagrams that match objects in your model # Java. Var sc_invisible=1 ; var sc_security= '' 804eebc9 '' ; in the diagram,... An object or a note that has an alias use the class keyword curly. Person or some other system or entity that interacts with the note keywords then. Match objects in your model data being processed may be a person or some other or! Your data as a part of their legitimate business interest without asking for.... Possible: --.. == __ define a usecase a purchase or updating information. Head styles and arrow colors: show arrow lines of different lengths x27 ; s syntax is the! 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