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

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How to use derive: in OCL when the type is not primitive

Let's consider the following class diagram I would like to express the following rule in OCL if cond = true then bderived = b else bderived.x = b.x + 10 bderived.y = b.y + 10 endif My ...
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How to specify OCL time constraints?

The article An OCL Extension for Real-Time Constraints describes and interesting extension to OCL for the specification of time constraints. New types OclConfiguration and OclPath are defined along ...
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2answers
191 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 ...
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204 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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246 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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1answer
252 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 ...
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167 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 ...
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128 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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137 views

UML activity diagram: How to end activity after Event Signal Action?

To my knowledge, event signal actions are not allowed to have output control flow, so how can I model the end of an activity after a event signal action? The same issue arises for accept event actions ...
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103 views

Where to set the model in this design (service-provider pattern)?

we are modelling an application using the "Service-Provider" pattern, where the service will offer a generic functionality implemented by different providers registered on the service. The ...
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111 views

Inheritance and constricted referencing

Let's say I have BaseA and BaseB classes. BaseB can have to several references of BaseA instances. Now, we have two other classes, DerivedA and DerivedB that respectively inherit from BaseA and BaseB. ...
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4answers
1k views

Can an aggregate root hold references of members of another aggregate root?

I know that outside of aggregates I can't change anything inside an aggregate without passing by his root. That said I would like to know if an aggregate root can hold references of members (objects ...
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361 views

How to indicate that a class might implement an interface?

Say I have a class User and an interface Administrator. Some users are administrator and can thus implement the interface. Most aren't, however, so it's false to say that "User implements ...
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4k views

What is a Package Diagram? and What is a Sequence Diagram? [closed]

In many interviews I've been asked this question. What is a Package Diagram? and What is a Sequence Diagram? and difference between Package Diagram and Sequence Diagram. Thanks in Advance. Edit ...
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1answer
232 views

Best way to design chess game [closed]

This is a theoretical question, and excuse me if it is not clear, I am new to this field. Thing is, I was asked to design a chess game in an interview (java/ android.) And my intuition was that P. ...
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1answer
534 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 ...
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3answers
2k views

Should I create a use case diagram for each screen?

In projects with many use cases, it's valid to create different use case diagrams, one for each screen? Or I shouldn't guide myself on the GUI of the software to make this, why? As a clarification, ...
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1answer
615 views

How to construct UML activity diagram reflecting real programmed source code as docs

Please, tell me the things I must use for modeling an (Enterprise Architect) activity diagram of object1.method1() calls object2.method2() I'm able to dragndrop a method of a class from model ...
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3answers
887 views

UML - Class Diagrams Order -> Products

I have a class diagram that is like this: < Order > (1) CAN HAVE (M) < products > But therefore Order has the following: Order_Id Customer_Id Order_date_day Order_date_month ...
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1answer
74 views

What is the UML idiom for classes that are too big to fit into one box? [duplicate]

I am documenting an existing system using UML 2, and a few of the classes are too big to comfortably fit into a single class box. So far, I've resorted to breaking up the class into multiple boxes ...
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186 views

How to do this in Standard UML?

In the below Sequence diagram, when the user have entered the Username and Password, I have to do the authentication. Now you can see two details valid details and invalid detail in the diagram , ...
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2answers
68 views

The right way to show the big use-case diagram

I have the big use-case diagram: May I pack some use-cases in packages and then show diagram by the following way:
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2answers
121 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 ...
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1answer
449 views

Use Cases with respect to downstream systems

Use cases are primarily meant for interaction between user and a system. It could be used for interaction between system and another system. The actors are primarily roles. It is easy to document ...
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133 views

Plan variable and call dependencies [closed]

I'd like to write down the design of my program to understand the dependencies and calls better. I know there are class diagrams which show inheritance and attribute variables. However I'd also like ...
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2answers
179 views

ID in class diagram

As far as i know, we do not add an attribute like id to the classes in the class diagram. right? But when we create a database, or when we want to call an instance, we need its id, so why do not we ...
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173 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 ...
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1answer
184 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 ...
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1answer
121 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
2k 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: ...
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1answer
516 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 ...
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1answer
61 views

Is where a link goes part of a view use case?

Say I got a minimal use case such as "view home page" or "view banner ad". Should it be included or exluded in the use case actually following the link? What I mean is that whether it belongs to the ...
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1answer
2k views

Class Design and Structure Online Web Store

I hope I have asked this in the right forum. Basically, we're designing an Online Store and I am designing the class structure for ordering a product and want some clarification on what I have so ...
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1answer
1k views

Sequence Diagram for Response Redirect in ASP.Net Webforms

In asp.net webforms I have a home aspx page that has a “Go” button. [This is the only control in this page]. When this button is clicked, the user is redirected to “UserProfile.aspx” page. How can we ...
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1k views

Updating and organizing class diagrams in a growing C++ project

I am working on a C++ project that is getting bigger and bigger. I do a lot of UML so it was not really hard to explain my work to co-workers until now. Lately I implemented a lot of new features and ...
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3answers
2k views

Any examples of using Visio to document software? [closed]

I have Visio 2010 and want to learn how to use it to document software. Does anyone have examples of what Visio does well? Are there any things that Visio can do, but there are better tools for the ...
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1answer
38 views

UML- Aggregation or Association

Below is the problem for which I have created a UML diagram with Staff as superclass and waiter, manager and hosts as subclasses, I understood other parts, except for the relation between table and ...
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1answer
25 views

Can I use partitions of activity diagram to place activity instead of actions? [closed]

Im making an activity diagram and Im using activities instead of actions because Im not going into much detail in the steps being described. I want to separate the activities in the partitions but all ...
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3answers
112 views

How to design a UML class diagram for two sub systems?

Currently I am working on a project which has two sub system: a web application and a web API (consumed by android app) and both being developed as separate project since the API system need to deploy ...
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1answer
2k views

Is login a use-case for a user of a system?

I've been researching since my last project last semester and I haven't found a definitive answer for this question. Now I've got one more project to draw a Use-Case diagram and I'm still confused ...
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1answer
247 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 ...
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130 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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1answer
476 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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1answer
79 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 ...
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1answer
86 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 ...
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2answers
283 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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1answer
163 views

Class diagrams - do aggregated/composed classes automatically see each other?

Let's say that in the game, a player has a pet: Player<>------Pet Obviously player can access Pet's fields and methods, but I assume Pet does not know about the player? I need that Pet can access ...
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1answer
177 views

How to model optional use cases in UML

Let's say, I want to model an application which allows users to model class diagrams. The high level use case can be modelled as UC1:Model Class Diagram, which refines itself into UC11: Model Class, ...
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1answer
142 views

Extending Composite Structure model generally/in Enterprise Architect

I'm currently on a project, which integrates domain specific techniques in the modelling tool Enterprise Architect through UML Profiles. The domain specfic model almost matches the structure of the ...
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1answer
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How can I use UML to model a relationship between two classes, where one has functions exposed as friend to the other?

I have a two classes: ------------ --------------- X Y ------------ --------------- ...