Questions tagged [uml]
The Unified Modeling Language is the industry standard for modeling software-intensive systems.
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Which association should be in the class diagram
there are a vehicle class and customer class . In short, in the customer class there is a function that shows 'can this person or company rent that car'.The function uses a object of vehicle and ...
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How to show type introspection in UML
I'm modeling a part of Python/Qt GUI code which uses reflection to construct a collection of widgets, in a form. The code works like this:
There is a Model which has attributes of various types, ...
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Correct way to represent acquaintance enforced by interface in UML class diagram
Suppose I have the following client code:
using System;
namespace InterfaceCompositionUml
{
internal class Program
{
static void Main(string[] args)
{
...
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UML relationships
Could someone explain to me if the relation in this class diagram is a "dependency" or "association" relationship and why?
I cannot edit the picture. The terms translate into ...
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UML Component diagram: Dangling interfaces or connecting two
I'm a novice in UML component diagrams.
How would I draw the following situation?
I have an << item >> called "DataAquisition". This item consists of a << unit >> ...
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Can a use case use both extend and include?
Can a use case use both extend and include?
For example like the "Take Advanced Knowledge Quest" use case in the picture below.
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Should I include an actor to represent the database in a use case diagram? [duplicate]
I'm working on the documentation of software management system. That system can be linked with an e-commerce website to get financial data directly. For example when a transaction will be made it will ...
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What if the parent can't exist without a child? (Class diagram)
I've built a matchmaking system where two of the classes look like this:
I know that it actually looks like an inheritance, but in the code it doesn't extend to the PlayerInMatchmaking and the ...
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What is a possible order of these actions in this Activity Diagram?
Context: This is from a practice exam, and we aren't sure what the proper answer was
Question: What is a possible order of actions for this activity diagram?
Options:
A->B->D or A->B->C-&...
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Sequence diagram with successive requests
Please help with a diagram in which there are sequential requests.
The logic is the following:
Service 1 sends a PUT Trigger an export request to Service 2
If the response is 200 OK, then after 10 ...
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UML sequence diagram - When to start and end activation box
I am using the c language. I created one lifeline for each file. I am confused about the activation box. Many people said an activation box indicates an object is active and processing a task. In case ...
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How to cope with state flows in UML?
I got a few questions about using UML state machines in software architecture:
I have to design an STM and express it as part of a UML model. There is a singelton STM Maintainer holding the instance ...
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Is the UML sequence diagram correct?
The following sequence diagram is rendered by Sparx Enterprise Architect. Is the start of the new activation (blue) correct? Shouldn't it rather continue with the existing activation on the Object2?
...
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Does the UML spec indicate any difference between what can go on a component diagram and what can go on a class diagram?
If I understand the UML 2.5.1 spec correctly, the definitions and constraints for UMLClassDiagram and UMLComponentDiagram are identical and furthermore the set of things those diagrams may show are ...
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GOF class diagram for Builder pattern appears to contradict its corresponding sequence diagram
In the Design Patterns: Elements of Reusable Object Oriented Software, the Gang of Four present the following canonical form for the Builder pattern:
In Appendix B the following is mentioned ...
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How to represent in uml a class which takes another class and sets its self as a member on it
In the picture above class of the type implementation will at some point receive a class of type C1. Classes that implement Contact will at some point hold references to C1.
So should the diagram be ...
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Does UML have a grammar that correlates to its diagrams?
UML is generally taught as a standardized way of diagramming software, however, I've heard recently that there's an actual grammar behind it. I've searched the UML specification and haven't found ...
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Do software engineers use UML diagrams of object models, domain models, system sequence diagrams and operation contracts?
Do software developers actually use UML diagrams, and more specifically object models, domain models, system sequence diagrams and operation contracts? I am taking a computer science degrees, and we'...
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Arrow head for a reply message in UML Sequence Diagram
In UML sequence diagrams, there is the possibility to specify a synchronous call with a reply message.
Example (taken from https://en.wikipedia.org/wiki/Sequence_diagram)
When modelling that in ...
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How to Represent actions in a UML state diagram that may be executed from a base state or as a result of another action from that state
I am creating a UML state diagram to help me plan the card game simulator I'm working on. At the moment I'm stuck on an issue where actions that can be performed from the "Main" state, the ...
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Is inheritance in use case diagrams between actors limited to one specific diagram
Is inheritance in use case diagrams between actors limited to one specific diagram or is it applies to other diagrams too? e.g. I got 2 actors let's say Actor A, Actor B. I got also two use case ...
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How should I model the actors in a use case diagram for a platform that allows users to both watch videos and create their own channels, like YouTube?
Should I use separate actors for "Video Watcher" and "Channel Creator," or a single actor called "User" that represents all users of the system?
i have a webapp where ...
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Mapping class diagrams to source code
I'm attending a software engineering class at my university, and my final consists of a fully-documented desktop application to be built in a four people team.
While designing and coding this software,...
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UML Class Diagram Excersise
Problem statement:
The information system of a university must manage information relating to its employees, departments,
institutes, courses provided, and research projects.
Information relating to ...
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I'm very confused coming from MYSQL, is it necessary to "connect" classes via matching IDs as attributes or are associations enough?
I'm making a class diagram for my school project, an Inventory Management System. So far, I've made the use-case and activity diagrams, however, I'm struggling with the class diagram and mostly ...
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Is this the main difference between Composition and Aggregation? [duplicate]
I think the difference between Composition and Aggregation is as follows.
Composition: When the parent object is killed, the child object cannot be used by another object.
Ex: Employee and BankAccount....
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UML Diagram double arrow
In a Microsoft Learn article on MVVM there is an, what I assume, UML diagram that didn't make sense to me. (https://learn.microsoft.com/en-us/archive/msdn-magazine/2009/february/patterns-wpf-apps-with-...
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How to add methods in a class that uses other classes in UML class diagrams?
I have an index file that uses three main JS classes each defining one method. The JS application is about listing a folder datasets, deleting a dataset from that folder, or uploading a dataset from ...
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Is there a UML symbol representing instantiation? This one doesn't seem to be one
The following figure comes from https://spring.io/guides/topicals/spring-security-architecture
I refer to it as a "figure" rather than a "diagram" as I'm not sure if it is.
the ...
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Use case diagram feedback; is this correct?
I'm trying to learn to create use case diagrams and would appreciate some pointers. The sample problem is to create a use case diagram for a seller in an online magazine selling site, I only have to ...
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Can we use external parties as objects in a sequence diagram?
I am currently building a sequence diagram for a website to allow customers to make online bookings for a travel agency. If a customer books a flight, he/she can use an online payment method to pay ...
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How to show C++ concept relations in UML
A C++ concept can be constructed by combining other concepts or a list of required expressions, with boolean operators.
When a class A inherits from B, there is only one relation (mostly resembles ...
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UML design for data analytics of aggregated Survey Data
First and foremost, let me say that I do not have a Software Engineering background . I need help from the community as I have been assigned to create a UML (Unified Modeling Language) design from ...
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UML State Machine Diagram - How to model an event that occours repeatedly
I'm trying to model the evolution of a player's energy in a game.
I have an "alive" state, and a transition to it from the initial pseudostate that has the effect of setting the initial ...
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Deployment diagram condradictions
I am trying to understand how a deployment diagram works by making one and reading up on it. I have come across multiple different (contradicting) statements or I am flat out misunderstanding them. ...
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How to deal with often repeated relations in UML Class Diagrams / ERM?
Suppose you have a ERM containing about 40 Classes / Entities. Most of them in quantified relations to others, some of them as standing there alone.
How to deal with a very often used relation/...
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Is documenting a big project with UML Diagrams needed, good to have or even not possible?
I developed a big(ger) project, which is in use already and grows, gets altered, fixed, etc. every week.
Until now I am the only developer. Since the team has to grow, also we will be more developers ...
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UML Statecharts
I have been using an implementation of UML statecharts in C++ similar to that defined in the book "Practical Statecharts in C/C++" by Miro Samek (https://www.state-machine.com/psicc).
One of ...
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Use Cases in Clean Architecture, in Requirements Specifications from Software Engineering and Use Case Diagrams in UML
Well, I've been studying software architecture a lot, Clean Architecture in specific and I came across some multi meanings terms and "Use Case" is one of them.
I'd read in some places that ...
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Documenting my abstract class/interface - what is important?
I am still an beginner/intermediate programmer at best so apologies if I misuse terminology.
I work with SCADA software for my job, specifically Ignition by Inductive Automation. It's made for rapid ...
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Two actors have same use case but can access different extends (Use Case Diagram)
I am trying to create a use case diagram. In the diagram, I have two actors that have access to the same use case (View Properties) but they have different functions related to the use case. Can ...
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How to present my Actors and Objects inside Sequence diagram for an Online Management Exam system
I am working on an online exam management system, which have those main actors:-
Super Admin. Can manage questions/answers under all functional areas.
Functional Admin. Can add questions/answers ...
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How to represent NoSQL entities
I've mainly studied SQL structures, and I know that the representation of the entities can look something like this:
However, I'm building this app with MongoDB, so NoSQL DB. I'm aware that MongoDB ...
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Regarding generalization and classification in UML
Currently I am reading UML Distilled - Third Edition (Martin Fowler) to catch up some new thoughts and spot interesting things I am not yet aware of.
On of those things I came up is the ...
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Use case diagram question confusion
For this question we got for a mock test we did and I have put the correct options in bold
Consider the following use case diagram, is it correct to state that:
a. Customer directly interacts with ...
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3
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UML - State Machine Diagrams: Mapping States which can be transitioned to from anywhere
I am trying to model a case management system in a UML State Machine Diagram. It is an approval style process and the case can enter a withdrawn state at any time if it is no longer required. This ...
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Sequence diagram question
For this question:
Considering the following sequence diagram, it is CORRECT to state that:
Select one or more:
a.
Message 4 might never be executed.
b.
Message 5 is not complete until the Customer ...
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UML arrowhead confusion
The answer to this question is A however I can't wrap my head around how there is a inheritance given the only information is the quote below (ie. a player is not a kind of team). It would make more ...
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How to document a NoSQL document-based data model?
How do you document the logical data model of a document-oriented database like MongoDB?
For relational databases, Entity-Relationship diagrams or UML class diagrams are used.
What is the practice for ...
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Instance of component inside a (non-instance) component. Does it make sense?
A colleague of mine did this UML component diagram to represent both the required/provided interfaces and the internal structure of the subsystems that compose the system we're working on:
(The ...
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