Questions tagged [uml]
The Unified Modeling Language is the industry standard for modeling software-intensive systems.
443
questions
-1
votes
0answers
12 views
Is a mobile app's page a state in state diagram?
I'm currently creating uml diagrams for my bachelor's thesis on a project i worked on as an intern which comprehends a mobile app i wrote.
What i was wondering is: in an UML state diagram, is an app's ...
2
votes
2answers
76 views
Object Instance Diagram - What can be modeled?
According to my professor, one of the following relationships cannot be modeled in an object instance diagram:
Association
Composition
Generalization
I made the argument that the association could ...
0
votes
3answers
148 views
Diagram to show how one object “becomes” another?
I am working in a purchasing system where we take calls:
public class Call
{
public List<CallItem> CallItems { get; set; }
}
The calls can be turned into quotes, where call items become ...
0
votes
1answer
41 views
How to merge object nodes in an activity diagram?
I have the following simple activity diagram:
My problem / question about is the last activity and its incoming object flows:
how to model proper UML here?
In UML-Spec 2.5.1 I find these quotes:
...
0
votes
3answers
148 views
How can we make a UML diagram (or something similar) for a project which doesn't contains classes (like non object oriented)?
I am working on a python project and I didn't use classes but created different modules and added functions in them.
Now I need to draw a diagram to describe the project/application for a paper. I ...
-2
votes
1answer
129 views
UML class diagrams - how do I draw a class diagram that shows a self-reference? [closed]
So I have the following case. I have an interface A and an implementation AImpl. Now I have another implementation of A, called A2Impl, which references any instance of A besides implementing A ...
2
votes
2answers
86 views
What to do with data types with lots of connections in a UML class diagram
I have a Pose data type, consisting of x, y, and rotation values.
This being a robotics application, the Pose data type is used in about a dozen places throughout the application. Connecting all ...
1
vote
2answers
81 views
UML sequence diagram for a peridoc operation
I have a scheduled operation in my spring boot application using spring boot scheduler.
this operation executes every period of time(30 minutes) and adds data in the database if conditions are met.
I ...
0
votes
4answers
170 views
Class diagram for electric guitar and bass
Hi I was recently asked this in an interview to represent a 6 string guitar and a 4 string bass in class structure. I am still new to software design and analysis so was not able to complete the ...
1
vote
1answer
38 views
Need to model properties on relations in UML. How is this done?
I have a datastructure that involves rating items, much like Netflix do. Now those ratings are numbers that are attached to relations between objects in a graph database. However, it seems as if ...
1
vote
1answer
43 views
Choice of appropriate UML diagram during Analysis phase [closed]
I am new to the formal idea of UML diagrams, but I have drawn and read system type diagrams for years. I wish to set a very simple exercise for the analysis stage of a project. I am considering the ...
0
votes
4answers
134 views
Can systems have only one use case?
I'm building a news aggregation system that collects news articles from several websites, then classifies them into categories, tags them with keywords and saves them to a database. All actions are ...
1
vote
1answer
48 views
UML - Overload operations with different parameters and a different return type
I would like to know if it is allowed in the UML to specify a different return type for overloaded operations. This is possible for methods in Java:
public class C
{
public int addOne(int a) {
...
2
votes
1answer
97 views
UML - Changing the visibility of operations when overriding them
I am trying to find out if it is allowed in the UML to change the visibility (access modifier) of an operation when overriding it. For example, in Java it is possible to increase the visibility of an ...
2
votes
1answer
66 views
Ternary association VS association class
I was wondering, are these 2 class diagrams equivalent EXCEPT the fact that in diagram A, a student doesn't have to have a study program?
The way I see it - for example in diagram B a study program ...
0
votes
1answer
30 views
When designing a system how could I describe the way sequence diagrams are related?
After the sequence diagram are made the sequence methods become code, before writing some code that would alter database records I would like to know how to detect if a sequence is doing the job ...
1
vote
1answer
31 views
Entity Relationship Model do I have to connect a table which is not using attributes from another table?
I tried creating an Entity-Relationship-Model, but I just don't get if I have to connect some tables and if I have to connect all, how do I connect tables which don't use attributes from another table....
0
votes
1answer
30 views
What are the differences and connections between UML Profile diagram & UML Class diagrams
I am doing research for developing a software platform and I have created some class diagrams for the platform. My supervisor adviced me to use UML profiles as well to describe the platform in a more ...
1
vote
2answers
78 views
Association in Use Case diagram have arrow?
I research about [association] in use case diagram :
It is a line has not arrow as image:
https://www.uml-diagrams.org/use-case-actor-association.html
But i using Rational Rose:
If i draw a [...
1
vote
2answers
137 views
Is “Dynamic Link Library” an actor?
I have a Software.
User will use software to process file,
But my software will use a other software or "Dynamic Link Library" of 3rd party.
Is "Dynamic Link Library" of 3rd party an actor?
1
vote
1answer
83 views
C# variables in Sequence diagram
I am playing with sequence diagram. And main question is how to draw properly on sequence diagram interaction with variable. How to draw
1) When MakePayment aggregates person
insurance....
1
vote
1answer
40 views
In a Conceptual class diagram, should Abstract Classes and arrowed lines be utilised?
Since we are just describing the problem domain rather than showing how the actual software will be designed, does that mean that we should not need abstract classes to show inheritance and arrowed ...
0
votes
1answer
61 views
How to model an association class in a UML class diagram where only one of the class has access to it?
Given this scenario: "Clinicians can record their own notes for each patient, viewable only by them." I would model it like this:
Clinician ----> Patient
and "Notes" as an association class ...
0
votes
2answers
74 views
Usage of composition relationship between two class in UML
I'm having quite a difficulty with what i think would suit a Patient class and a Record class in UML
Basically the Record class stores the patient's information such as name, vitals, gender, age and ...
0
votes
2answers
138 views
How to model scenarios in UML class diagram?
I'm doing a conceptual class diagram for an app that lets:
Clinicians view the patient's lab results and their calculated Reynolds Risk Score.
Clinicians make changes to one or more of the patient’s ...
2
votes
1answer
79 views
Modeling “nested” interfaces in UML
I am modeling a system that exposes a number of "plugins" (not known at modeling time) through a web API. I have a number of "system" plugins that permit to interact with the system, something like "...
3
votes
3answers
173 views
Can there be different use case diagrams of the same system for different stakeholders?
Can there be different use case diagrams for the same system with differing levels of complexity?
My question arises due to the fact that use case diagrams can represent a single system in a complex ...
1
vote
1answer
43 views
“Screen-states”: How to express all of them in a concise way? [closed]
If my software has some screens, how do i express the various states of those screens? If, for example, I have 3 checkboxes in a screen, so I have 8 combinations total and at first thought, 8 states ...
1
vote
2answers
202 views
UML - Identifying use cases and actors
I'm currently learning object-oriented programming and we have moved on to UML. We are learning about use cases and actors currently and we need to create a list of actors and use cases initiated by ...
1
vote
1answer
76 views
How to depict several sub-options in use case diagrams
Shown in the image below is an example of an actor that can perform an action and this action branches into several options (none of them HAVE to be performed). My question is whether the arrows ...
-2
votes
1answer
185 views
Ordered vs sequence in association in UML
I am trying to understand UML class diagrams.
Imagine two classes that are related with each other by association. What is the difference between {ordered} and {sequence} for the association?
2
votes
2answers
83 views
What does message means in UML sequence diagrams?
In UML sequence diagrams, given two objects A and B, if Object A sends a message to Object B. Does this mean the message is a method in Object B which is invoked from Object A?
1
vote
2answers
86 views
Composition - legal class diagram
I wanted to ask if this is a valid class diagram:
I tend to think not, because it forces a certain wheel to belong to two vehicles at the same time (because of the 1 multiplicity). If the ...
-2
votes
1answer
65 views
method taking a class parameter
I have recently begun studying UML. All is going fine so far until I saw the following:
This is a class Called Point2D
It has 2 attributes which are x, type float and y, type float.
It has 3 methods
...
1
vote
2answers
239 views
How to model attribute dependency “inside one class” in UML class diagram?
I have the following "software reality in working code" (also no access to it):
There is a class Class1 with different attributes
AttributeA - sums up all "ordinary attributes"
EnumType
DataType
...
-2
votes
1answer
70 views
requirements model and UML
I need to create requirements model for my software(first step of software engineering), But I don't know which icon of UML can help me to implement requirements model.
0
votes
2answers
183 views
Is it possible to represent an if statement in a system sequence diagram?
I'd like to highlight that this questions is about a System Sequence Diagram (SSD) and not a simple Sequence Diagram and of course any help would be appreciated!
I'm reading Graig Larman's book ...
3
votes
1answer
111 views
How to convert a use case to a use case diagram?
Suppose I have a use case, like this example.
Normal Flow:
The user will indicate that she wants to order the items that have already
been selected.
The system will present the billing and shipping ...
1
vote
2answers
67 views
Detecting UML usecase correctly
UML Diagrams says:
A use case is a kind of behaviored classifier that specifies a
[complete] unit of [useful] functionality performed by [one or more]
subjects to which the use case applies in ...
1
vote
1answer
183 views
Problem in creating a correct finite-state-machine for a given short text
I like to create a finite-state machine for the given text below. While solving this, I came accross with several problems I listed at the bottom. (This example is in terms of testing (where you later ...
-5
votes
1answer
76 views
How this diagram can be improved [closed]
I'm looking for failures in this "token based login" design, besides the UML "syntax" errors. Theoretically speaking, it will do the trick when implemented on an small project.
If true, sorry about ...
0
votes
3answers
67 views
UML dependency in a UML deployment diagram with two arrow heads
Can I draw mutual dependencies between two artifacts in a deployment diagram as a dashed line with two arrow heads? Or is this a no-go in UML?
0
votes
2answers
80 views
Problem in modelling this because too slow calculation (robot football)
I like to build a component connector view / UML diagram for the given problem but I realized it's way too slow if you try to do it exactly as it's given in the following text. My question is what ...
2
votes
2answers
76 views
If a user delivers a file as input for a use case, what is the actor : the user or the file
Our call center collects requests from customer, which are processed by back office. Much of the requests are passed in spreadsheets by type of request.
In view of automating some work of back office, ...
4
votes
1answer
469 views
How do you correctly turn this text into an activity diagram (problem with timer)?
This is only an extract from a very long text, the one I'm not sure about. It's about a photo booth (an automata that makes a picture of you if you insert coin).
The automata has a camera that is ...
1
vote
2answers
448 views
Which SOLID principles are broken by this class diagram?
I just read about all the 5 principles S,O,L,I,D and I like test it in little example if I understand them correct.
Which SOLID principles are hurt by this class diagram?
I think what is broken is ...
2
votes
5answers
401 views
Design pattern for creating object hidden from client
I am having difficulty understanding which design pattern would be best for the following scenario. An application uses a database. That database can either be the production version (SQL) or a test ...
1
vote
0answers
43 views
UML how to model parallel activity with runtime-dependent number of participants
I want to model an activity that involves processing several items in parallel. So to speak, I want to find a Activity Diagram representation for something like the following snippet / pseudocode:
...
1
vote
1answer
237 views
Trying to understand Sequence Diagram
I am trying to understand two sequence diagrams that I have found in the SE course at university of Washington. Can you confirm if my understanding is correct ?
Diagram 1:
According to my ...
0
votes
1answer
153 views
How to manually model a UML activity Diagram to JSON with Qt C++?
Suppose I have a kind of UML activity diagram with 1-n forks and joins.
The assignment of the individual nodes relative to each other is defined by an XML relationship table via UUIDs where each ...
