| Allocation relationship [message #1473091] |
Fri, 14 November 2014 10:30  |
 Philip LOUCOPOULOS
Messages: 30
Registered: May 2014 |
Member |
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Hi there !
Using Papyrus Luna and a SysML model, I am looking for the allocation relationship to relate components between them, but I do not see them ...
Can somebody explain me if they exist and where to find them ?
Should I use the relation « Dependency » and rename it « allocate » ??
Or should I create a stereotype ? But Which metaclass to use ?
Thank you !
Philip
[Updated on: Fri, 14 November 2014 10:30] Report message to a moderator |
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| Re: Allocation relationship [message #1473312 is a reply to message #1473105] |
Fri, 14 November 2014 14:18  |
Philip LOUCOPOULOS
Messages: 30
Registered: May 2014 |
Member |
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I need a few precisions as I am not yet familiar with the concept.
You write: The "Allocated" Stereotype is provided by the SysML::Alllocations sub-profile.
I understand: In my model, when I use a relationship like dependency, derive or satisfy or verify, in the tab Profile I can apply the SysML stereotype Allocated and eventually remove the default stereotype, just to keep Allocated. Is it correct ?
You write: It can be applied on a Named Element. The Stereotype "Allocate" can be applied on an Abstraction relationship.
My understanding: I see that on any element, I can apply the allocated stereotype. What do you mean by an abstraction relationship ?
You write: Allocated#allocatedFrom and Allocated#allocatedTo are derived properties. An "Allocated" element is "Allocated from" another element if there exists an "Abstraction" relationship between them, stereotyped with "Allocate".
I understand that the stereotype Allocated contains these 2 derived properties.
As an example: To allocate a block to another, isn't it sufficient to create a relationship (like dependency, derive, satisfy or verify) and to apply the Allocated stereotype to this relationship from the tab Profile ?
Thank you for your help !
Philip
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| Re: Allocation relationship [message #1473332 is a reply to message #1473312] |
Fri, 14 November 2014 14:35 |
Camille Letavernier
Messages: 952
Registered: February 2011 |
Senior Member |
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Hi,
"Abstraction" is a UML Metaclass, and is a specific kind of "Dependency". It is the UML element extended by e.g. "Satisfy" or "Verify". Apparently, no SysML Diagram provide the "Abstraction" or "Allocate" palette tool, so you can't create it directly (That's a Papyrus bug I guess; I'm not sure in which kind of SysML Diagram you are supposed to use Allocations), and you need to "cheat" a little bit.
Since "Verify" and "Satisfy" are UML Abstractions, you can indeed create one of these links, remove the "Verify" or "Satisfy" stereotype, and add the "Allocate" one. But these links are only available in the Requirements diagram, so that's not really good. The best solution would be to use the UML Class Diagram directly, create an Abstraction, then stereotype it with "Allocate".
In Papyrus, we typically use Tables (and not Diagrams) to specify Allocations. There is an "Allocation Table" available. But this table only manages the "Allocate" stereotype; it doesn't automatically apply the "Allocated" stereotype on elements.
Quote:As an example: To allocate a block to another, isn't it sufficient to create a relationship (like dependency, derive, satisfy or verify) and to apply the Allocated stereotype to this relationship from the tab Profile ?
No: you need to apply the "Allocate" stereotype on the Abstraction, and the "Allocated" stereotype on the Blocks (source and target). Otherwise the SysML model is incomplete (As far as I understand it; but I'm not a SysML expert)
HTH,
Camille
Camille Letavernier
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| Re: Allocation relationship [message #1474405 is a reply to message #1473091] |
Sat, 15 November 2014 11:32 |
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Hi Philip, hi all,
You can create allocations through "Allocation table" (it is the default mechanism to do allocations).
when you create a new allocation table, each new row will automatically create an allocation relationship in your model (that you can see in model explorer).
Hope it helps
raphaël
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