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Tag Archive for modeling

UML Actions with object and control flows

Consider a UML Action contained in a UML Activity defining the behavior of a classifier. Such Action has three input pins connected to other output pins of different action by means of object flow edges. It also has an incoming control flow.

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?

Is my DFD accurate?

This is my first ever DFD that I made after my fair share of learning but I have no way of verifying whether it is correct or not. Although I have taken utmost care to make sure it is right, I may be wrong.

Showing user and userinterface interaction on a sequence diagram

I need to draw a sequence diagram and I am not sure exactly if it is correct to show interaction between user and user interface in this diagram. For example I want to make a panel visible or invisible based on choosing a check box by user. Is it correct to have it on a sequence diagram? and how can I draw it?

Is my use case diagram correct?

NOTE: I am self studying UML so I have nobody to verify my diagrams and hence I am posting here, so please bear with me. This is the problem I got from some PDF available on Google that simply had the following problem statement:

Problem Statement:
A library contains books and journals. The task is to develop a
computer system for borrowing books. In order to borrow a book
the borrower must be a member of the library. There is a limit on the
number of books that can be borrowed by each member of the library.
The library may have several copies of a given book.
It is possible to reserve a book.
Some books are for short term loans only. Other books may be
borrowed for 3 weeks. Users can extend the loans.
1. Draw a use case diagram for a library.
2. Give a use case description for two use cases:
• Borrow copy of book
• Extend loan
Diagram:

Is my sequence diagram correct?

NOTE: I am self studying UML so I have nobody to verify my diagrams and hence I am posting here, so please bear with me. This is the problem I got from some PDF available on Google that simply had the following problem statement:

FP for simulation and modelling

I’m about to start a simulation/modelling project. I already know that OOP is used for this kind of projects. However, studying Haskell made me consider using the FP paradigm for modelling a system of components. Let me elaborate: