There was a time when I was studiously reading UML 2 articles like this one about the UML 2 Composition Model.

This also reminds me of The Journal of Object Technology.

Its mission statement is this.

The Journal of Object Technology (JOT) is a peer-reviewed, free and open-access journal dedicated to the timely publication of previously unpublished research articles, surveys, tutorials, and technical notes on all aspects of object technology.

But I have never been able to draw the kind of UML 2 diagrams that Conrad Bock describes in his articles in the JOT. Visual Paradigm for UML is the tool that I think is the most flexible and I have used both the Community Edition as well as the licensed version. StarUML is good too but not as versatile as Visual Paradigm.
Later on I started using TikZ and PGF and Graphviz and liked them very much.
UML was passe but I still use it.

Recently I started using PlantUML for a code review project and it was like a whiff of fresh air. It uses Graphviz and there are IDE plugins. Everything was easy to learn and use. I could open IntelliJ IDEA and browse the code and also type the PlantUML Domain-specific language code and draw a complex UML 2 diagram.

It is easy for the developers to design their code.I wish they paid heed to someone.

Composition Model


skinparam class {
	BackgroundColor WHite
	ArrowColor SeaGreen
	BorderColor Black
class "<u>MyCar : Car"{

class "<u>YourBoat : Boat"{

class "<u>E2 : Engine"{
	String name

class "<u>P1 : Propeller"{
	String name

class "<u>E1 : Engine"{
	String name

class "<u>W1 : Wheel"{
	String name

class "<u>W2 : Wheel"{
	String name

class "<u>W3 : Wheel"{
	String name

class "<u>W4 : Wheel"{
	String name
"<u>E1 : Engine" -- "front"  "<u>W1 : Wheel" : "powers"
"<u>E1 : Engine" -- "front" "<u>W2 : Wheel" : "powers"
"<u>E2 : Engine" --  "<u>P1 : Propeller" : "powers"
"<u>YourBoat : Boat" "inBoat" *-- "p" "<u>P1 : Propeller"
"<u>YourBoat : Boat" "inBoat" *-- "e" "<u>E2 : Engine"
"<u>MyCar : Car" "inCarAsBack" *--  "<u>W1 : Wheel"
"<u>MyCar : Car" "inCarAsBack" *--  "<u>W2 : Wheel"
"<u>MyCar : Car" "inCarAsBack" -right--- "back" "<u>W3 : Wheel"
"<u>MyCar : Car" "inCarAsBack" -right--- "back" "<u>W4 : Wheel"
"<u>MyCar : Car" "inCar" *-- "e" "<u>E1 : Engine"

hide members
hide  circle


Update 1:

The flow final activity is in the UML 2 spec. If it is not desired to abort all flows in the activity, use flow final instead. It is a circle with a cross inside. But I didn’t see that in the PlantUML doc.

How can I create it ?

Flow final

The PlantUML team responded.

Well, it’s not possible today.

However, we propose that we have now 2 keywords :

stop (that will display the actual circle)
end (that will display a circle with a cross inside)

Update 2:

What’s New ?

7 June, 2015: Add end keyword in Activity Diagram Beta. (Thanks to Radhakrishnan Mohan for the suggestion).

Is this ok for you, or do you prefer to stay anonymous ?

PS : You can test the beta version here

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s

%d bloggers like this: