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Sub Node vs. Bordered Node [message #1743648]

Sun, 18 September 2016 00:54

Eclipse User

Hello,

is there a semantical difference between a Sub Node and a Bordered Node of a container?

Lets say, in my EMF meta model, Class "OneContainer" has a containment realtionship [0..*] with Class "OneElement". Is it correct, that when I choose in Sirius between modelling "OneElement" as a Sub Node and a Bordered Node - the only difference is the representation inside the container or on its border?

Or should Bordered Nodes only be used for non-containment node mappings?

Cheers
Emil

Re: Sub Node vs. Bordered Node [message #1743754 is a reply to message #1743648]

Mon, 19 September 2016 09:01

Eclipse User

Hi.

The difference is only graphical. You can have one or the other, or both, and the choice is completely decorelated from the actual containment structure of your semantic model. It is purely a notation choice for you to make, depending on how you want you diagrams to look. You can chose to represent as sub-nodes inside a container elements which are not "physically" contained inside the semantic element the container represents, and vice versa.

Regards,
Pierre-Charles

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Re: Sub Node vs. Bordered Node [message #1743954 is a reply to message #1743754]

Wed, 21 September 2016 02:32

Eclipse User

Hello Pierre-Charles,

thank you for this information.

Cheers
Emil

Re: Sub Node vs. Bordered Node [message #1744400 is a reply to message #1743954]

Mon, 26 September 2016 10:13

Eclipse User

Hello,

another question about that:
If I have my container element "OneContainer" in my EMF meta model, that contains "CointainedElement" - but then I represent "OneContainer" in Sirius as a NODE (and not as a container, because I want the representation styles of a node as the ones from containers are very limited) - and then I just add the contained element "ContainedElement" as BORDERED NODE:

Is that very bad habit? So should EMF containers always be modeled as containers in Sirius?

Cheers
Emil

Re: Sub Node vs. Bordered Node [message #1744451 is a reply to message #1744400]

Tue, 27 September 2016 03:48

Eclipse User

It's not a "bad habit", it really all depends on what you want your graphical representation to look like. Sirius does not care about the containment structure of your semantic model. Indeed, one of the selling points of Sirius is its complete flexibility in this area; it's the whole point of the computed semanticCandidateExpressions. You can have any number of ways to represent the same underlying model, depending on the purpose of each diagram/representation. Some will have a graphical structure which closely matches the actual "physical" structure of the model; some will show completely different points of view (projections, if you want) of the same data. So don't worry about "misusing" this power Smile

Design your diagrams according to their purpose from their target user's point of view, not necessarily according to the technical details of how the data model was implemented.

Regards,
Pierre-Charles

Re: Sub Node vs. Bordered Node [message #1744808 is a reply to message #1744451]

Fri, 30 September 2016 06:45

Eclipse User

Hello Pierre-Charles,

thank you very much for your answer and explanation. Much appreciated!
That makes it clear for me now Smile

Cheers
Emil

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