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0
votes
2answers
180 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 , ...
0
votes
1answer
762 views

How to show levels of User Roles in ERD?

I felt this is the best place to ask this, rather than Stackoverflow as it is not related to programming. Ok. The thing is I need to draw an ERD of a leave management system. Suppose there are three ...
2
votes
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 ...
5
votes
1answer
1k views

Sequence Diagrams

I recently read the book 'UML Distilled' and found the sequence diagrams very useful. My question is that can we show 'data flow' as well on a sequence diagram? This is my first time on sequence ...
4
votes
2answers
1k views

Types of ER Diagrams

I'm currently taking a class for database design, and we're using the ER diagram style designed by Peter Chen. I have a couple of problems with this style: Keys in relationships don't seem ...
8
votes
6answers
2k views

On-the-fly graphical representation of code [closed]

I know about Omondo's plugin for live code-UML synchronization in Eclipse, but I was wondering if there was any other tool/IDE/IDE-extension that has some form of live graphical code representaiton ...
3
votes
2answers
673 views

can an object in a sequence diagram send a message call to the user?

I need to make a sequence diagram and I'm not sure how to represent user input. Is it correct to have a message be sent from an object to the user asking for user input or should all objects be ...
5
votes
1answer
596 views

How to read and understand ER diagrams

I've been handed the ER diagram for a quite complex database. Complex to me at least, 849 tables. One of the architects says to understand the code, you need to understand the database and ...