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Home » Eclipse Projects » Papyrus for Real Time » Q about structure of ISO 80000 and QUDV in SysML Papyrus and how to apply it.(SysML, ISO 80000, QUDV, Papyrus)
Q about structure of ISO 80000 and QUDV in SysML Papyrus and how to apply it. [message #1843775] Tue, 17 August 2021 15:26 Go to next message
Marnix Verkammen is currently offline Marnix VerkammenFriend
Messages: 4
Registered: August 2021
Junior Member
Dear all,

I have limited experience with SysML, but I am part of a team creating some form of mapping between a SysML software and another MBSE tool.
I want this mapping to be ale to interpret the ISO 80000 package, but for this, I first need to know how this package works in Papyrus.
I am using the ISO80000 library given in Commnent 6 of this bug-thread: Comment 6 of this Eclipse bug discussion: https://bugs.eclipse.org/bugs/show_bug.cgi?id=478131#c6


I am unsure as to how the new units or QuantityKinds (QKs) should be defined.
Let's assume that I want to create the unit Newton from scratch (not using the one in the ISO 80000 package), stating that it is a unit derived from kg, m and s (km/s^2).
Do I then need to create and InstanceSpecification with as name Newton and as classifier DerivedUnit (taken from the QUDV modelLibrary)?

I have tried creating a normal SysML unit, than change its classifier to derivedUnit, but then the unit transforms itself into an InstanceSpecification. Hence why I think one should create an instanceSpecification.

My question then is: how does one assign the factor, unit and (primary)quantitykind, as shown in Figure E.9 of OMG' s System Modelling Language v1.5 document? I place the figure below.
I see that these relationships exist in the QUDV modelLibrary in Papyrus, however I am unsure how to drag them (?) under the newton Derived Unit.

Would someone be so kind as to give more information, or a resource in which this can be found? I have searched quite extensively on the internet, but have yet to find a manual, forum thread, etc. about using the QUDV library in Papyrus.

----------------------------------------------------

A second question I have regards the structure of the pre-existing Units, Valuetypes and QuantityKinds. Are they linked properly in the Papyrus ISO 80000 package? By that I mean for instance: Are the unit and quantityKinds of a ValueType properly defined? I see that most (if not all, since I have not checked all of them of course) Valuetypes have empty Units and QKs. An example of this is <<ValuetType>>mass(zeptogram), see image below.

In the same line of thought: Are prefixed units (or derived units for that matter) actually defined as described in the OMG SysML document? As far as I can see prefixedUnits such as zeptogram have two slots: one for the name (in an instanceValue) and one for the prefix. The latter seems to be also an instanceValue with "zepto" written in it. Hence, I am not sure if it is in any way connected to the prefix "zepto" defined in ISO 80000-1

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I look forward to your help or advice.
Kind regards,
Marnix.

PS: if this thread is better suited elsewhere, please do move it. I could not find any better place in this forum than here.
Re: Q about structure of ISO 80000 and QUDV in SysML Papyrus and how to apply it. [message #1843793 is a reply to message #1843775] Wed, 18 August 2021 14:26 Go to previous messageGo to next message
Ernesto Posse is currently offline Ernesto PosseFriend
Messages: 438
Registered: March 2011
Senior Member
Hello.

You've got the wrong forum. This is the forum for PapyrusRT, which implements UML-RT, not SysML.

For SysML questions you should ask in the Papyrus forum.

Regards
Re: Q about structure of ISO 80000 and QUDV in SysML Papyrus and how to apply it. [message #1843805 is a reply to message #1843793] Thu, 19 August 2021 07:22 Go to previous message
Marnix Verkammen is currently offline Marnix VerkammenFriend
Messages: 4
Registered: August 2021
Junior Member
Dear Ernesto,

Apologes.
Thanks for letting me know though!

I'll post it now in the Papyrus forum.

Kind regards,
Marnix
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