The Unified Modeling Language is the industry standard for modeling software-intensive systems.
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1answer
32 views
How to represent a multiple choice attribute in UML class diagram?
I'm modelling a Filter class that stores the options for filtering a search. Some of the attributes are multiple choice.
For example, if you are filtering hotel rooms you have a Price attribute that ...
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2answers
54 views
Confusion about associations in UML class diagram
--------------------- ----------------------
| FLIGHT | | STEWARD |
--------------------- ----------------------
| Arrival time | | Steward ID |
| ...
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2answers
47 views
My class diagram needs to model a relationship with varying quantities
I am trying to design a restaurant ordering system in UML, which should also include the stock system.
One of the classes is a Dish (i.e. a dish on the menu), and another is an Ingredient.
My ...
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3answers
105 views
What do I use for a variant in a UML class diagram?
Does standard UML specify how a variant (aka tagged union, discriminated union, sum type, etc) should be depicted in a class diagram?
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1answer
56 views
How to manage coupling in model classes
I'm doing a class diagram for a game project, but I'm stuck on a coupling problem.
Context
The projet is a turn-based game. Two users are playing. They've got units on a map. They play until 1 ...
1
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1answer
220 views
Designing classes the right way [closed]
I am trying to design my classes in the optimal way for the following scenario.
A city has metro lines covering a number of stations.There are 4 lines represented by 4 colors.The user has to enter ...
2
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2answers
107 views
UML 2.0 Use case diagrams extend
I have a question regrading usecase diagram which im rather confused when to use extended and include. Ive gone through a tone of documents and tutorial and examples. But im rather confused.
I have a ...
0
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1answer
82 views
How would you draw this UML class diagram?
I'm currently trying to learn UML but I have trouble with this one. Lets say you have a container with cards, a container with players, and that player has also cards. How would you draw this in a ...
2
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3answers
296 views
Which approach is right doing use case first or classes first ? why? [duplicate]
There are people who prefer to do use cases first and then do the classes, but there are also some who prefer to do class diagram first and then use cases. So is it personal choice for convenience? ...
2
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1answer
58 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
120 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. ...
1
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2answers
404 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
votes
1answer
307 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
135 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 ...
0
votes
1answer
70 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
66 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) ...
2
votes
3answers
253 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 ...
2
votes
2answers
195 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 ...
1
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1answer
85 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 ...
2
votes
1answer
405 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 ...
3
votes
3answers
214 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 ...
1
vote
1answer
98 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 ...
3
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4answers
368 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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0answers
41 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 ...
0
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2answers
105 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 ...
3
votes
1answer
85 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 ...
2
votes
2answers
203 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, ...
0
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0answers
68 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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votes
1answer
55 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 ...
1
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2answers
115 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 ...
3
votes
2answers
149 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
322 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
72 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
157 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
3k 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
203 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 ...
-1
votes
1answer
132 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
310 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 ...
-1
votes
3answers
236 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
votes
2answers
135 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
votes
1answer
45 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
vote
2answers
141 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
308 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
votes
2answers
2k 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
223 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 ...
1
vote
0answers
115 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
282 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
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1answer
182 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
121 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
vote
3answers
124 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 ...
