Messages

1

Uml Process / Re: Activity Diagram with Sub-Activity

« on: March 14, 2023, 08:38:15 pm »

Thx Geert, that confirms my apprehension. I guess what qwerty suggested, is a good way:

You need to use the instance. To show the contents you can drag the diagram inside and resize it to fit.

q.

2

Uml Process / Re: Activity Diagram with Sub-Activity

« on: March 14, 2023, 08:05:34 pm »

Sub-Activity is just the wording from the EA docu:

https://sparxsystems.com/resources/gallery/diagrams/software/sw-activity_diagram_with_sub-activity.html

There is a "Structured Activity" object type in EA, but that is an Activity, which can't have (in EA) outgoing Control Flows, in contrast to the example from the EA docu. Then there are the object type "Action (call behavior)", which are instances of other Activities and can have outgoing Control Flows, but it can't display his enclosed Activity diagram.

3

Uml Process / Re: Activity Diagram with Sub-Activity

« on: March 13, 2023, 09:33:19 pm »

What you mean is, I have to add the instance (Action (call behavior)) and overlay the action with diagram, right?

And additionally, there is no way to create a diagram, like Sparx is showing in their own example?

Greetings
Sebastian

4

Uml Process / Activity Diagram with Sub-Activity

« on: March 13, 2023, 08:17:41 pm »

Hi,

I'm trying to display a Sub-Activity in an Activity diagram on a a higher level, like shown here:



However, if I paste the Sub-Activity as Link, I'm unable to create outgoing Control Flows. If I add it as Action (call behavior) I'm unable to display its content.

Can someone please help me out?

Greetings
Sebastian

5

Uml Process / Re: Start Activity with the press of a botton

« on: March 03, 2023, 08:55:58 pm »

Thanks again. I guess you will see more topics, created by me, in the future. 

6

Uml Process / Re: What is a Sparx interaction point? It seems not to be in the UML spec

« on: March 03, 2023, 06:46:06 pm »

Interaction points are just a grouping. They were called embedded elements in earlier versions.

In my opinion this is important because if we start adding non-metamodel features to the tool, eventually it will become unusable like many other CASE tools before it.

So you're suggesting that Alias, Keywords, Status, Version, Author, Phase, Complexity, Created, Modified, Language, and Filename should all be removed? And that's just in the properties window for every element and they have been there for at least 20 years.

Even though I not nearly experienced as the other people replying to this thread, I don't see a problem here. The UML/SysML spec does not define how to group UML/SysML objects in the editor and to call the tab 'Interaction Points' for grouping such elements is understandable for me, as Eve also stated out.

7

Uml Process / Re: Start Activity with the press of a botton

« on: March 03, 2023, 06:25:23 pm »

Hi Eve.

Thanks for your reply. First of all, numbered my Alternatives in my text contrary to the titles of the diagrams. My preferred Alternative was the diagram "Alternative 3" and not "Alternative 1". To my shame I forget the basic rule, you mentioned:

UML 2.5.1 15.5.3.1

An ExecutableNode shall not execute until all incoming ControlFlows (if any) are offering tokens.

Following your advice a good solution would look like this:



Right?

Greetings
Sebastian

8

Uml Process / Start Activity with the press of a botton

« on: March 02, 2023, 07:29:17 pm »

Hi everyone,

I have question how to model the activation of a system in an Activity Diagram. The system should start up if a button is pressed or a charger is connected. Intuitively I would model the Activity like this:



But in this case, the Activity would have no Initial Node. Is this allowed according to the UML/SysML spec? My second thought was to use Guards:



The third possibility, I could think about, was using Actions like this:



The first alternative feels most right for me, but I'm not sure. How would you model it?

Greetings
Sebastian

9

Uml Process / Re: How to hide the type of an element in diagram

« on: February 28, 2023, 07:04:27 am »

Thanks. :-)

10

Uml Process / How to hide the type of an element in diagram

« on: February 22, 2023, 05:36:13 am »

Hi again,

a quick question: How do I hide the type of an element in a diagram?

In example this Block in SysML Block Definition Diagram?



Greetings
Sebastian

11

Uml Process / Re: Modelling error handling in an activity diagram with an Interrupt Flow

« on: February 14, 2023, 08:26:20 pm »

Hi again qwerty. 

Thanks for helping me out so often.

Back to the topic. What you write is exactly what I tried. But EA is not allowing to connect the Decision Node to the Action Pin with an Interrupt Flow.

Greetings
Sebastian

12

Uml Process / Modelling error handling in an activity diagram with an Interrupt Flow

« on: February 13, 2023, 08:47:27 pm »

Hi again,

I'm trying to model an error handling. Please don't judge me too hard. 

My plan was to use an Interruptible Region and an Interrupt Flow starting at the Decision Node, going to the "Error handling" Action (Red square).



EA does not allow an Interrupt Flow from the Decision Node to the "Error Handling" Action outside of the Interruptible Region. My idea feels a little bit unusual. However, I could not find the reason why this is forbidden in the UML spec. Can someone tell me, why this is not allowed?

And also, what would be a better idea to model it?

Greetings
Sebastian

13

Uml Process / Re: Does a Control Token also traverse via an Object Flow

« on: February 13, 2023, 08:18:53 pm »

Thank your very much, especially for the clarification.

Greetings
Sebastian

14

Uml Process / Re: Does a Control Token also traverse via an Object Flow

« on: February 13, 2023, 06:27:29 pm »

Understood and sorry to ask again, but do Control Token travel over Object Flows?

Greetings
Sebastian

15

Uml Process / Re: Does a Control Token also traverse via an Object Flow

« on: February 11, 2023, 12:18:41 am »

Thank you very much, so just for confirmation, because your quote contains more information:

Control Token only traverse over Control Flows and not over Object Flows?

Greetings
Sebastian