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

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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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22 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, ...
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0answers
20 views

UML Sequence Diagram generator for working Python code [closed]

I'd like to look at some working Python code in terms of UML sequence diagrams for better understanding. Now I have to draw this diagrams with my pen - it's too slow. And I know that Python has ...
3
votes
1answer
35 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> { ...
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2answers
483 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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0answers
25 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: ...
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0answers
27 views

Which other UML diagrams can I use instead of a state transition diagram in a Systems Requirements Specification? [closed]

I'm currently writing a System Requirements Specification (SRS) but I'm stuck with the system features. I was wondering if I could use for example activity diagrams to describe the different modes.
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1answer
170 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 ...
8
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8answers
9k views

OO Design related questions in technical interviews

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? ...
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0answers
48 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 ...
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3answers
10k 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 ...
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1answer
69 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
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2answers
103 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
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2answers
621 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
1answer
109 views

Ideas on 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 ...
1
vote
3answers
664 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
117 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
91 views

Confusion about associations in UML class diagram

--------------------- ---------------------- | FLIGHT | | STEWARD | --------------------- ---------------------- | Arrival time | | Steward ID | | ...
2
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2answers
699 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
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5answers
6k 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
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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 ...
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2answers
62 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
150 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
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2answers
230 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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4answers
400 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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1answer
70 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
240 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
129 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
130 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 ...
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3answers
4k 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 ...
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2answers
146 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
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3answers
421 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
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3answers
313 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? ...
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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? ...
2
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1answer
75 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 ...
0
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1answer
140 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. ...
0
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1answer
88 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 ...
2
votes
1answer
332 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
167 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
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1answer
80 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
108 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 ...
2
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3answers
281 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
89 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 ...
3
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3answers
222 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
164 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
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 ...
2
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2answers
3k 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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vote
2answers
489 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
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 ...