The Unified Modeling Language is the industry standard for modeling software-intensive systems.

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3
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203 views

UML class diagram: how to annotate observer-subject relationship?

How can I annotate in a UML class diagram that an instance of ClassA is registered as an observer of an instance of ClassB? (Both implement the appropriate interfaces). This doesn't really belong in ...
0
votes
1answer
789 views

UML class diagram - instantiation dependency relationship: who depends on who? [duplicate]

I did some reading on the <<instantiate>> relationship in UML class diagrams. It's a dependency relationship where one side depends on the other. However, I'm not sure who depends on who: ...
0
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1answer
75 views

What's the difference between model for test and model for development?

What's the difference between model for test and model for development? Is it that the model for test contains only what we should test? Do we use the same diagrams in model for test and model for ...
0
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1answer
295 views

I want to draw class diagram, but I don't know how to put server and database inside? [closed]

I just started to draw class diagram, I think it is based on 3-tie architecture. I have mobile application, servers, database, and web interface. But I do not know if it should put the server in? I ...
2
votes
2answers
11k views

UML class diagram notations: Differences between Association, Aggregation and Composition

I'm confused about some of the notations of UML class diagrams. Pretty sure I know what Association means. Any relationship between instances of two classes, where an instance of one class needs to ...
2
votes
1answer
251 views

UML class diagrams: How to show dependency

Please consider a program with four classes: Class A, B, C and D. Classes A and B are subclasses of abstract super-class C. Class D is dependent on C. Meaning: It holds a C objectOfTypeC field. As ...
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votes
1answer
230 views

Should I label class diagram variables as private or public?

In my program, I have several class variables whose access specifier is known as private package. The default accessor specifier in Java is known as private package where it is accessible within the ...
0
votes
1answer
381 views

My UML class diagram is too complicated, what should I do?

Classes have 10-20 links with one another and you can't see anything in that mess of a diagram Unfortunately we finished coding already and if we change the class diagram we have to redo the whole ...
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votes
3answers
305 views

How important is it to learn UML for an OO developer? [closed]

When studying OOP by myself I often encounter UML class diagrams. I understand them, but don't completely know how to write them. Meaning, I don't entirely know what each kind of arrow means, and ...
0
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2answers
200 views

UML Class Diagram: Abstract or Interface?

I am modeling a class diagram and have spotted an opportunity to simplify it slightly. What I want to know is, would this it be better to implement an abstract class or an interface? The scenario is ...
0
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1answer
58 views

Compatibility between Class Diagram and Sequence Diagram

Do the message being passed between objects in Sequence Diagram match with the methods in Class Diagram?
1
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2answers
163 views

How to capture “Display advertisement” use case?

What kind of use case it would be for to "show ad in part of the view"? Who could be the actor to relate with? User or System? As user has no specific goal to see ads, i am wondering what is the best ...
1
vote
3answers
563 views

Should we include external systems in Class diagram?

I want to draw a class diagram that shows the following for an application: An external content management system that publishes some news items. The class that represents the news item in my ...
3
votes
2answers
5k views

Mapping between 4+1 architectural view model & UML

I'm a bit confused about how the 4+1 architectural view model maps to UML. Wikipedia gives the following mapping: Logical view: Class diagram, Communication diagram, Sequence diagram. Development ...
2
votes
2answers
341 views

Should I always start with UML as a good practice when designing classes?

I am in the middle of creating a Bundle for PHP application based on Symfony 2. I want the bundle to be clear and good designed, so I constantly move and refactor code, rename methods, reorder ...
2
votes
0answers
139 views

UML diagram for an existing implementation

I have some code, which I want to present in UML, but I've stuck at one point. Let me tell you something about code's functionality. I have a workspace in which I can place some Components, select ...
3
votes
1answer
352 views

Should JavaScript and PHP objects be treated as different objects in an interaction diagram?

I'm drawing a communication diagram for an application where you can buy books. I'm using domain-driven design and have a 'shop' object, a 'cart' object, and a 'book' object. My first communication ...
1
vote
1answer
233 views

Sequence Diagram. UML “Use Case Ends”

I have a couple of questions about UML. Firstly, how would you show "Use Case Ends" on a sequence diagram. Secondly, if you have an alt in a sequence diagram for "Variable == false", would you need ...
-1
votes
1answer
133 views

What is meant by a step-by-step refactoring plan describing implementation of design [closed]

What is meant by a step-by-step refactoring plan describing how to implement a certain design? As little as I know about refactoring it regards improving a (UML) design model and has nothing to ...
1
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3answers
145 views

How to consider the login function collecting requirements of an application? is it a user requirement?

I am working on an application that expected to the user logs in when the application is started (as for example it is in Skype: the user open the application and appear to him a login mask when he ...
2
votes
2answers
602 views

Package diagram for an MVC patterned project?

We are required to make a package diagram for our senior project. Since our project uses MVC patter design, we created an MVC class diagram, now, our problem is in creating the package diagrams from ...
1
vote
1answer
103 views

How to depict Import a file action in the Sequence diagram

Everyone says sequence diagrams are so easy but I just cannot figure this out. Basically user clicks on an 'Import from temp folder' button, the program opens a window with a list populated with ...
0
votes
1answer
120 views

Class diagrams - do aggregated/composed classes automatically see each other?

Let's say that in the game, a player has a pet: Player<>------Pet Obviously player can access Pet's fields and methods, but I assume Pet does not know about the player? I need that Pet can access ...
1
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1answer
373 views

UML class diagram - can aggregated object be part of two aggregated classes?

Some sources say that aggregation means that the class owns the object and shares reference. Lets assume an example where a company class holds a list of cars but departments of that company has list ...
4
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1answer
668 views

Is there a representation for mixins or traits on UML?

Is there a representation for modern programming constructs that are becoming common in modern OOP/hybrid languages like mixins/traits/categories/partial classes ?
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2answers
506 views

Object inheritance and method parameters/return types - Please check my logic

I'm preparing for a test and doing practice questions, this one in particular I am unsure I did correctly: We are given a very simple UML diagram to demonstrate inheritance: I hope this is clear, it ...
1
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0answers
117 views

UML activity diagram: How to end activity after Event Signal Action?

To my knowledge, event signal actions are not allowed to have output control flow, so how can I model the end of an activity after a event signal action? The same issue arises for accept event actions ...
2
votes
3answers
1k views

Do activity diagrams always end in one endpoint?

For example an activity diagram for a simple program: Get User data. If User Exists DO something, ELSE do nothing. End. I often see diagrams with multiple endpoints but also with just one. Should ...
2
votes
3answers
1k views

How to create a use case diagram for board game played on PC

I'm struggling with a task as I was given to practice UML and use cases. The problem is that I should model computer version of a board game so I am unsure about a few things. obviously it does not ...
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vote
2answers
564 views

Activity diagram, can merge node have more than 1 output?

There is a simple system, that allows users to do 4 things: ADD, EDIT, DELETE, PRINT data. I am due to model it (I'm entirely new to UML activity diagrams) and from notation, I dont understand ...
0
votes
2answers
324 views

How to indicate that a class might implement an interface?

Say I have a class User and an interface Administrator. Some users are administrator and can thus implement the interface. Most aren't, however, so it's false to say that "User implements ...
2
votes
2answers
208 views

How can I indicate if an object operates with another one in an UML class diagram?

Suppose I want to draw a class diagram of a DAO and an Entity. The DAO is used to load instances of the Entity from the database. How can I represent this relationship on my class diagram? Is this ...
1
vote
1answer
576 views

How can you denote the access modifiers “friend” and “protected friend” in UML?

The symbols for access modifiers that I know are relevant for many different languages: public:        + private:       - ...
5
votes
1answer
324 views

How to display in compositional relationship that the item knows about the container?

I'm drawing a class diagram and noticed that sometimes I got a relationship (composition or aggregation) where the item uses the container, and sometimes not. What is the visual difference in a ...
2
votes
1answer
366 views

Need help understanding UML diagram

I'm focusing on trying to understand UML diagrams and learning to interpret them in order to implement the designs they describe. In the following diagram, I am not clear on what the implementation ...
2
votes
3answers
736 views

What to use in UML for included module in ruby?

I like to create simple class diagrams for my projects. Most of the time I just use composition, inheritence and associations. IMB's basic UML resource tells all about this. However I'm using ruby so ...
2
votes
1answer
413 views

Can we illustrate a CPU pipeline with a UML sequence diagram?

I study multicore pipelining and the diagrams are not UML sequence diagrams for instance Why not remake this diagram like an UML sequence diagram, would not that be more clear so that we can see ...
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0answers
78 views

Where to set the model in this design (service-provider pattern)?

we are modelling an application using the "Service-Provider" pattern, where the service will offer a generic functionality implemented by different providers registered on the service. The ...
0
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3answers
1k views

UML representation of type being passed as a parameter

I want to draw a UML diagram of my program. Class Barney has a method Yabadaba(Doo d) which takes a parameter of type Doo. How do I represent that class Doo is used in class Barney in my UML diagram? ...
4
votes
1answer
3k views

What is the general format of a Software Design Specification?

I'm trying to document a piece of software I wrote in detail. An SAS is too high level and doesn't cover the API. I found several examples of an SDS online, but I don't see a trend in their format. ...
3
votes
1answer
244 views

UML sequence diagrams - include

I'm currently doing my OCPJEA assignment. I have to draw several sequence diagrams for the use cases presented in the documentation. One of the use cases (A) state that after some interaction, the ...
0
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1answer
127 views

How to model optional use cases in UML

Let's say, I want to model an application which allows users to model class diagrams. The high level use case can be modelled as UC1:Model Class Diagram, which refines itself into UC11: Model Class, ...
0
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1answer
54 views

Is where a link goes part of a view use case?

Say I got a minimal use case such as "view home page" or "view banner ad". Should it be included or exluded in the use case actually following the link? What I mean is that whether it belongs to the ...
0
votes
2answers
472 views

Use Case Diagrams - should I create a diagram just for a view business rule? [closed]

I'm modeling a UCD where I have two actors ( a content producer and a developer).. the content producer is going to create and specify details of a storyboard functionality, and the other actor ...
3
votes
3answers
291 views

When presenting a software design to upper management

I'm presenting a software design for approval today and as I'm going through the hundreds of pages of design documentation, cherry picking what's important, I'm unsure if I should start with the ...
0
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1answer
390 views

How to construct UML activity diagram reflecting real programmed source code as docs

Please, tell me the things I must use for modeling an (Enterprise Architect) activity diagram of object1.method1() calls object2.method2() I'm able to dragndrop a method of a class from model ...
2
votes
1answer
541 views

Use case decomposition for class registration system

I am currently working on refactoring a summer camp registration system to include some new features and will also be using it as the basis for a new after-school class registration system. For this ...
0
votes
2answers
2k views

What is a Package Diagram? and What is a Sequence Diagram? [closed]

In many interviews I've been asked this question. What is a Package Diagram? and What is a Sequence Diagram? and difference between Package Diagram and Sequence Diagram. Thanks in Advance. Edit ...
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2answers
305 views

The Proper UML Model of a System for Non-Technical Boss

I've taken on some side work for this non-profit and last week was my first week on the job. They have two SQL Server Databases each with many tables in them that represent over 20 different ...
2
votes
2answers
1k views

Software Architecture Modelling

I am a little confused at how best to visually model a space-based architecture (SBA) for presenting the system/software architecture design to a client. The goal of this modelling is to show: The ...