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

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3
votes
2answers
311 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 ...
3
votes
1answer
155 views

Model of simple traffic simulation [closed]

I want to write a simple traffic simulation with one road intersection. First I thought of a cellular automata in the model but it should not be limited by an underlying discrete grid system so the ...
2
votes
0answers
53 views

is this use case well structure?

I'm trying to create a use case that make sense, and i am a little bit confused with the alternate path i think i am doing it in the wrong way, the system should tell the admin when a shared playlist ...
2
votes
1answer
184 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 ...
1
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1answer
25 views

UML : What is an Activity in an Activity diagram?

I am translating a Use Case diagram step into an Activity Diagram. Does every step of my UC diagram describe an Activity ? Is there one and only one Activity in an Activity Diagram ?
4
votes
3answers
6k 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 ...
0
votes
2answers
117 views

What kind of design diagram is this?

Here is a kata for the Bowling Game problem. Slide 9 (below) shows a design diagram. But its not obvious to me which box is a class and which is a property or method from the makeup of the boxes ...
0
votes
1answer
37 views

Multiplicities and ternary relations in UML and ER

With entity–relationship diagrams, there are two conventions of denoting multiplicities, (I) and (II): Say, a teacher T is giving ‹G› some lectures L. Then we can either write this as 1 ...
2
votes
3answers
144 views

How do I show 'creates' in a UML class diagram?

Let's say my code is going to look like this: public class MyController { private Foo foo; private FooGenerator fooGen; //setters public void work() { this.foo = ...
0
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0answers
56 views

Class design for an app that reads data from Active Directory

I am hoping someone can help me regarding design and architecture for an application. The application is basically a service written in C#. The purpose of this service is mainly to read data from ...
0
votes
1answer
47 views

UML diagram for attributes that can have two different types

I have been to an interview for a financial programming job, and I could not answer to one question for sure. I thought about it again, but I really cannot find a good answer. They asked me to design ...
38
votes
11answers
4k views

Is code commonly generated from UML? [closed]

So when I was at university I was educated on the benefits of UML and its future in code development. But from my industry experience, I've found that while we do use diagrams—ranging from ER ...
1
vote
2answers
119 views

Can a UML class diagram show two different relationships between two classes?

I have a class which has an inner (nested) class. I have shown this relationship between the two classes in my class diagram. However, I am also using the inner class within the outer class... do I ...
1
vote
3answers
185 views

Are there any good reasons to use ER Diagrams instead of UML Class Diagrams for data modeling? Is ERD the COBOL of data modeling?

Are there any good reasons to use ER Diagrams instead of UML Class Diagrams for data modeling, given the fact that class diagrams subsume ER diagrams? Or is it just for historical reasons because ...
1
vote
1answer
58 views

How to show link between a java class which gets JSON data from PHP script

I am trying to show the relationship that a java class has with a PHP script. The PHP script gets data from a database and then converts it into JSON format. This is then read by the java file. In my ...
1
vote
1answer
130 views

ER Diagram Multiplicity (UML)

Schema: #=PK Employee (#NIN, fName, lName, address, DOB, sex, salary, taxCode, deptNo) Department (#deptNo, deptName, managerNIN, businessAreaNo, regionNo) Project (#projNo, projName, contractPrice, ...
0
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0answers
44 views

How can attributes/annotations be illustrated on a UML class diagram?

Many programming languages offer a way to annotate types. For instance, in .NET this can be achieved by deriving a custom attribute class from System.Attribute and then annotating another type with ...
-1
votes
2answers
508 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
vote
2answers
73 views

Forming heavy use case diagram

We have a use case diagram for our software engineering course project that we have many use cases in every system and about 5-6 actors. How should we separate this heavy diagram to light weight ...
3
votes
1answer
157 views

Notifications in Use-case Diagrams

I'm writing a use-case diagram in which an actor gets a notification. My question is similar to this one except that I'm not sure if my notification use-case is a crosscutting concern. Suppose my ...
4
votes
2answers
13k 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 ...
1
vote
1answer
93 views

Inheritance vs Class Diagram [closed]

What is the difference between an inheritance diagram and a class diagram in UML? For the Computer Science A Level (a British test administrated by Cambridge University, so it's possible that this ...
2
votes
0answers
82 views

Var assignment in sequence diagram

I am trying to represent the function below (PHP function/Symfony2) as a sequence diagram using UML 2.0 and Visual Paradigm: private function getVeevaHcpSync($request, $action, $case) { ...
3
votes
1answer
74 views

UML: How to implement a template interface?

Suppose I have an aggregate type and I want to use it in conjunction with a template iterator. The following C# code gives an exact example of my model: public interface Iterable<T> { ...
1
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0answers
85 views

UML diagram for SSIS process

I'm trying to do some technical documentation and would like to include some diagrams to better explain the processes in the system. The process I'm currently trying to describe is the following: ...
9
votes
8answers
11k views

OO Design related questions in technical interviews [closed]

I've been attending quite a few interviews recently and have been asked by companies to answer "design a [insert model]" questions more than a few times. Is this normal in the industry nowadays? ...
1
vote
0answers
141 views

How Generate sequence diagram from xmi file

I know we can generate an xmi file from a sequence diagram, but for inverse, I want to know if we can generate a sequence diagram from a xmi file with any tool(ie write my own code as xmi file which ...
16
votes
3answers
12k views

UML Diagrams of Multi-Threaded Applications

For single-threaded applications I like to use class diagrams to get an overview of the architecture of that application. This type of diagram, however, hasn’t been very helpful when trying to ...
-2
votes
1answer
82 views

How do we design a good website, not graphical? [closed]

I always created an application without proper design before creating it and having a very hard to manage code which I don't want to touch it again. I understand to create a system we have these ...
0
votes
2answers
485 views

Different relationships between component and class diagram [closed]

How can I convert association of class diagram to component diagram? For instance what is the equivalent relationship of ->, aggregation and inheritance of UML class diagram to the component diagram? ...
3
votes
2answers
939 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 ...
2
votes
3answers
1k 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 ...
1
vote
1answer
260 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 ...
1
vote
2answers
167 views

Confusion about associations in UML class diagram

--------------------- ---------------------- | FLIGHT | | STEWARD | --------------------- ---------------------- | Arrival time | | Steward ID | | ...
2
votes
2answers
933 views

Project implementation details in node.js

I am working as a software engineer turned team leader in a large software company. One of my areas of strength is node.js, and we are in the process of moving a lot of our services to separate ...
13
votes
5answers
7k views

Are UML class diagrams adequate to design javascript systems?

Given that UML is oriented towards a more classic approach to object orientation, is it still usable in a reliable way to design javascript systems? One specific problem that I can see is that class ...
6
votes
4answers
1k views

Software design by pseudocoding?

Do you know a good way to design (i.e. write down) software with a method based on pseudocode? I'm new to software design and read some information about UML. My humble class hierarchies are good so ...
0
votes
2answers
91 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 ...
2
votes
3answers
264 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?
2
votes
2answers
332 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, ...
3
votes
4answers
453 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 ...
1
vote
1answer
98 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
vote
1answer
258 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
votes
2answers
145 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
votes
1answer
243 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 ...
0
votes
3answers
5k views

How to visualize timer functionality in sequence diagram?

I am developing software for communication with external device through serial port. To better understand the new functionality I am trying to display it in sequence diagram. Flow of events is as ...
1
vote
2answers
170 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 ...
7
votes
3answers
445 views

Should I create Use Cases or create Class Diagrams first?

So I'm designing an Education Management System and I'm wondering if I should be creating the Use Cases or the Class Diagrams first?
2
votes
3answers
351 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? ...
1
vote
3answers
2k 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? ...