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

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Diagramming for Business Strategy, App Development

a) Lets say I am planning to start a Business of providing the service of Web Design and Development. This becomes my basic Business Strategy. Then a few months later I add on the service of building ...
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3answers
645 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? ...
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39 views

Questions about UML in relation to the command pattern

http://www.oodesign.com/command-pattern.html In reading through a tutorial about the command pattern, I came across a UML diagram that seems to omit some relationships. For the following diagram, the ...
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1answer
167 views

How do you show the exception handler in a class diagram?

I have one exception handler class. I want to show this class in the uml -- class diagram. But, I do not know how to represent relationship between class <X> and exception handler class. How can ...
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102 views

Are there two type of associations between objects or are there just different representations?

I've been spending some time on 're-tuning' some of my OOP understanding, and I've come up against a concept that is confusing me. Lets say I have two objects. A user object and an account object. ...
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53 views

In UML is it correct to have an association class with a composition or aggregation relationship?

An example of an association class is given here: http://pic.dhe.ibm.com/infocenter/rsarthlp/v9/index.jsp?topic=%2Fcom.ibm.xtools.modeler.doc%2Ftopics%2Fcassnclss.html Composition and Aggregation ...
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1answer
78 views

How deep is enough to represent an algorithm in UML sequence diagram?

I have three simple classes. LoginController, UsersCatalog and User. UsersCatalog has an array of User. I have to represent a simple process of login. LoginController has a method login(username, ...
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2answers
116 views

What UML diagram should be used for modelling permissions/users/files in Linux?

If I am planning a structure for support testing in Linux, a structure that will contain packages, such files as shell and build scripts, app configurations, DBs, sources, tests and jars for to be ...
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2answers
112 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 ...
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2answers
408 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 ...
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3answers
230 views

Understanding UML composition better

The difference between Composition and Aggregation in UML (and sometimes in programming too) is that with Composition, the lifetime of the objects composing the composite (e.g. an engine and a ...
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33 views

Using object flow and control flow in UML

I have a UML activity diagram below, where there are two ways are shown in which actions can be done. Since the setting of values of a and b can be done any order before the action 2 is executed ...
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1answer
154 views

UML Receptions and AcceptEventActions

What shall be the relationship between the receptions of a class (was classifier before Aadaam correction) and the AcceptEventActions in the activity describing the behavior of its instances? I ...
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2answers
83 views

UML: Queue processor in a sequence diagram

Which is the appropriate way of representing a queue processor in a UML sequence diagram? I want to represent in the same diagram two systems that are loosely coupled through a queue. The first ...
2
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1answer
266 views

Things developers do before the coding phase [closed]

I'm a new software developer, and in my internship my boss asked me to develop an application that allows him to manage his inventory. Something small but, for me, very enriching. The application is ...
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3answers
82 views

UML Class Diagram: How can I represent “orthogonal” generalizations (or multi-inheritence)?

I try to represent in a UML Class Diagram the following object and features: The Object: A System (e.g. an electronic device) that can be of Type A, B or C If the System is of type A, it has a ...
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1answer
53 views

What diagram would be the best to describe the situation

I am working on a software integrated with the hardware component. I need to create a simple diagram to express that: Certain activity runs in a cycle (the device continously monitor a temperature) ...
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1answer
78 views

What should be used to diagram an application's internal architecture?

I have an application that has several dependencies, including a Matlab library and a Microsoft Windows Media Player ActiveX control. How would I graphically depict the internal architecture of this ...
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3answers
198 views

Sequence diagrams and the Implementation

In the design phase we create UML Sequence diagrams (in OOD). My understanding is that after creating an Use Case diagram if we need to show further information in terms of time sequence of events of ...
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1answer
77 views

Should state machine with synonym states be shown explicitly?

I am new to state machine modeling and while trying to model a system, I have a question. An example will explain it better: Considering a system that does calling (probably a customized cell phone ...
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210 views

is it valid that a state machine can have more than one possible state for some transition?

I have a requirement for a workflow which I am trying to model as a state machine, I see that there is more than one outcome of a given transition(or activity). Is it valid for a state machine to ...
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2answers
98 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 ...
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2answers
101 views

Buyer vs Seller on UML Model

I'm modeling an Online Classified System where, naturally, who sells also can buy and vice-versa. The question is: should I have two different Actors, Buyer and Seller or I could have, say, an actor ...
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2answers
1k 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 ...
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2answers
349 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 ...
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2answers
2k views

how to express alternative flows in activity diagram

I want to express the below events in an activity diagram: An alternative flow, such as "at step x of basic flow, user clicks cancel instead of ok". An alternative entry to the use case, such as ...
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3answers
875 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 ...
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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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33 views

How to model an optional input to an activity?

I am constructing a UML 2.0 activity diagram. The activity is to evaluate data from a usability study of a prototype. It can optionally end with just getting the user satisfaction results. But if the ...
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3answers
120 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 ...
3
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1answer
82 views

Access items of a container with a pattern

I've two C++ classes with a relation: a container class which has a list of items. For example a library has got many books. The classes are the library and the book. Now from the external world I ...
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0answers
53 views

How to implement 'use case control' object in (iOS) MVC?

In an MVC architecture pattern (for e.g., in iOS) there is a controller per view. In UML there is a concept of having Control object per use case to encapsulate an use case, which may span more than ...
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1answer
46 views

UML Diagram for Locations of Components

I am about to deploy a new project that will have different components being deployed on different servers and in different web sites/technologies/etc. I was just wondering what would be the best way ...
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2answers
108 views

How to handle long method names in sequence diagram?

I have a C# application that is developed with VS 2010 pro. The ultimate version would have a sequence diagram feature. Since I will "create" my sequence diagram manually, how do I deal with quite ...
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2answers
124 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 ...
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1answer
193 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: ...
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1answer
96 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 ...
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10answers
989 views

How useful is UML if you are a developer working alone in a project [closed]

How useful is UML if you are a developer working alone in a project?
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1answer
71 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 ...
2
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2answers
891 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 ...
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1answer
117 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
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1answer
177 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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1answer
103 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 ...
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1answer
243 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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3answers
197 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 ...
3
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3answers
277 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 ...
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1answer
42 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?
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176 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 ...
2
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2answers
193 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 ...
6
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4answers
340 views

What modelling technique do you use for your continuous design? [closed]

Together with my teammates, I'm trying to self-learn XP and apply its principles. We're successfully working in TDD and happily refactoring our code and design. However we're having problems with the ...