[news.eclipse.tools.uml2] Re: correct mapping of a dynamic simulation mo

["James Bruck" <jbruck@xxxxxxxxxx>]

... Or something like the following attachments...  it depends what you want
to convey.

- James.

"James Bruck" <jbruck@xxxxxxxxxx> wrote in message
news:eid6h0$81a$1@xxxxxxxxxxxxxxxxxxxx
> Hi Axel,
>
> When you say... " in and outputs are continuous values"... it makes me
> wonder if UML is the best choice for your modeling.  You might consider
> using electrical circuits to fully describe the details of you model.   I
> think UML can represent an abstraction of this model.
>
> You can take "BouncingBall" as one activity with input parameters gravity
> and initial position and output parameters V and Z.
> ( Gravity could vary if you want to run your model on the moon ).
>
> I still think CallBehaviorActions are the way to go for your Blocks.   The
> behavior is some activity called "velocity" or "position".   You could
> further describe those activities in terms of other actions.
> Even though you do not want to emphasize pins, I think you would still
need
> to use them for the inputs and outputs.
> Object flows are drawn between the pins.
>
> Consider the attachment ... it's a sketch with some issues :) but might
> represent what your "Bouncing Ball" closely enough.
>
> Cheers,
>
> - James.
>
>
> "AxelR" <reichwein@xxxxxxxxxxxxxxxxxxxx> wrote in message
> news:eicffi$622$1@xxxxxxxxxxxxxxxxxxxx
> > Hello James,
> >
> > thank you for the answer and the explaining picture. "A picture is worth
> > a thousand words" :-) In the attachment, I put a picture of the dynamic
> > model, in this case a Simulink model, that I would like to map to a UML
> > based model. You can also find the picture here:
> >
>
http://www.mathworks.com/products/simulink/demos.html?file=/products/demos/shipping/simulink/sldemo_bounce.html
> >
> > I still have some problems to do the mapping. This mapping problem sure
> > isn't the easiest. As you can see in the dynamic model, no pins are used
> > to describe inputs and outputs of blocks, as the in- and ouputs are
> > continuous values. The emphasis is also not on these in - and output
> > signals as the edges between the blocks are sufficient to easily and
> > precisely describe the information flow between the blocks. I could
> > imagine mapping the blocks to OpaqueActions and the edges to
> > ControlFlows. But I still need to put the parameters (not the in or
> > output parameters, but the ones defining the behavior of a block) of
> > every block somewhere in my UML model. A block might have many
> > parameters, and a ReadVariableAction to access each parameter of a block
> > would result in many "overweight" ReadVariableActions in the UML model.
> > Clearly, if variables could be added directly to actions, that would fix
> > the problem immediately. But as I understand the UML spec, that is not
> > possible or is there a trick? I could map every parameter of a block to
> >   a constraint of an OpaqueAction and define a SpecificationLiteral
> > under the constraint to define the value of the parameter. I think this
> > is the easiest way to "attach" some variables to an action, but it would
> > misinterpret the semantic behind the "Constraint" element.
> >
> > The mapping between the UML model and the dynamic simulation model
> > should be as easiest as possible, so that no one gets lost in the UML
> > model. I'm not restricting myself to activity diagrams. If there is a
> > better and nicer way to do the mapping (for example: blocks -> Instances
> > of classes, Edges between blocks-> InformationFlows between instances),
> > I would be grateful for any ideas or clarification.
> >
> > Axel
> >
> >
> >
> >
> >
> > James Bruck schrieb:
> > > Just to clarify a bit more...
> > >
> > > The pins correspond to parameters of the behavior.  An operation is
the
> > > specification of the behavior.
> > >
> > > Also, your diagram might look something like the following attachment.
> > >
> > > - James.
> > >
> > > "James Bruck" <jbruck@xxxxxxxxxx> wrote in message
> > > news:ei8817$ohp$1@xxxxxxxxxxxxxxxxxxxx
> > >
> > >>Hi Axel,
> > >>
> > >>Q. How can I describe a parameter of an operation?
> > >>A. Parameters of operations correspond to pins in Actions.   The
Action
> > >>refers to some behavior ie, the operation.   The pins correspond to
> > >>parameters on the operation.  They do not directly refer to the
> parameters
> > >>but correspond positionally to the parameters of the operation.  I
> believe
> > >>there have been previous postings on this if you do a search.
> > >>
> > >>Q. ... you say "k is a parameter of the operation" how can I access
it.
> > >>A. I'm a little confused on how you want to use k, I don't think you
> want
> > >
> > > a
> > >
> > >>simple InputPin as the you would for x.   I think what you want is to
> > >
> > > create
> > >
> > >>a Variable under the Activity.   You can then use ReadVariableActions
> and
> > >>AddVariableActions to read and write the value of that variable.
> Then,
> > >>you can model what you want completely with an OpaqueBehavior ( ie. A
> > >>CallBehaviorAction with its Behavior referring to an OpaqueBehavior ).
> > >
> > > You
> > >
> > >>can then create an InputPin for X, an OutputPin for Y and refer to a
> > >>ReadVariableAction for k.
> > >>
> > >>I'm still a little uncertain what exactly you are trying to do.  For
> > >>example, do you not have Classes or classifiers that can hold
> operations?
> > >>Are you restricting yourself to Activity diagrams only.
> > >>
> > >>Let me know what you finally decide on ... sounds interesting.
> > >>
> > >>Cheers,
> > >>
> > >>- James.
> > >>
> > >>
> > >>"AxelR" <reichwein@xxxxxxxxxxxxxxxxxxxx> wrote in message
> > >>news:ei814a$8tp$1@xxxxxxxxxxxxxxxxxxxx
> > >>
> > >>>Hello James,
> > >>>
> > >>>thank you for the answer.
> > >>>
> > >>>I also considered CallOperationAction and I really wish to model the
> > >>>dynamic simulation model as an activity diagram. I understand the
> > >>>concept of input and ouput parameters of an operation, described by
the
> > >>>Input- and OutputPins. But how can I describe a parameter of an
> > >
> > > operation?
> > >
> > >>>For example: y = k*x
> > >>>x is the input, y is the output, and k is a parameter of the
operation.
> > >>>And k is variable, it can be any number. I want to place the value of
k
> > >>>somehow in the UML model, so that the user can easily access it and
> > >>>change it. Where should I place this operation dependent parameter?
> > >>>
> > >>>Should I place it as a parameter that belongs to the operation?
> > >>>
> > >>>Thank you for the help.
> > >>>
> > >>>Axel
> > >>>
> > >>>
> > >>>
> > >>>
> > >>>James Bruck schrieb:
> > >>>
> > >>>>Hi Axel,
> > >>>>
> > >>>>Consider CallOperationAction.   CallOperationActions refer to an
> > >>
> > >>operation
> > >>
> > >>>>of a Class.  They own InputPins that correspond to parameters of the
> > >>>>operation and
> > >>>>OutputPin's that correspond to the return parameter.
> > >>>>I think you can show what you want using InputPins and OutputPins.
> > >
> > > You
> > >
> > >>can
> > >>
> > >>>>use ObjectFlow's between the pins.
> > >>>>You seem to be on the right track with Activity Diagrams.
> > >>>>
> > >>>>Alternatively, if you want to model the structure of a certain
> > >>
> > >>structured
> > >>
> > >>>>classifier you can consider using Composite Structure Diagrams.
You
> > >>
> > >>can
> > >>
> > >>>>model properties using parts or roles and connect them using
> > >
> > > Connectors.
> > >
> > >>>>Ports are also useful for modeling interaction points on structured
> > >>>>classifiers.
> > >>>>
> > >>>>If you want to convey how a group of associated parts contribute to
> > >>>>accomplish one particular task you might consider creating a
> > >>
> > >>collaboration
> > >>
> > >>>>with roles in it's structure diagram and show how the roles are
> > >>>>inter-connected.
> > >>>>
> > >>>>Sequence diagrams could also be of some use if you want to model
> > >
> > > general
> > >
> > >>>>instances or specific instances ( a particular run ) of executing
> > >
> > > code.
> > >
> > >>>>Creating a profile and stereotypes would be a final step if you have
> > >>>>concepts specific to your domain that you wish to emphasize.  ( Keep
> > >
> > > in
> > >
> > >>mind
> > >>
> > >>>>that you could just use keywords as a "ultra-light weight" way of
> > >>>>emphasizing your concepts. )
> > >>>>
> > >>>>... a little vague but I hope this helps....
> > >>>>
> > >>>>Cheers,
> > >>>>
> > >>>>- James.
> > >>>>
> > >>>>
> > >>>>
> > >>>>"AxelR" <reichwein@xxxxxxxxxxxxxxxxxxxx> wrote in message
> > >>>>news:ei7ob0$qt6$1@xxxxxxxxxxxxxxxxxxxx
> > >>>>
> > >>>>
> > >>>>>Hello,
> > >>>>>
> > >>>>>I need some help on how to model a dynamic simulation model(for
e.g.
> a
> > >>>>>Simulink model) in UML. The dynamic simulation model consists of
> > >
> > > blocks
> > >
> > >>>>>with certain characteristics that are connected to each other. For
> > >>>>>example: an input block sends a constant value to another block,
> which
> > >>>>>integrates this input value over time, and this result is sent to
> > >>>>>another block and so on...
> > >>>>>
> > >>>>>I am asking myself what is the best way to map the information
> > >
> > > included
> > >
> > >>>>>in a dynamic simulation model into a UML model with domain specific
> > >>>>>stereotypes, in this case specific to the dynamic simulation model.
> > >>>>>
> > >>>>>I first thought it would be practical to map the blocks of the
> dynamic
> > >>>>>simulation to actions in an activity, which would be connected by
> > >>>>>control flows, like this:
> > >>>>>dynamic simulation model -> Activity, blocks -> Actions, Edges
> between
> > >>>>>blocks-> ControlFlows
> > >>>>>
> > >>>>>However as actions do not have properties (as classes and instances
> > >>>>>have), how can I map the parameters of the blocks to the actions?
The
> > >>>>>block parameters would need to be in a stereotype applied to the
> > >
> > > action.
> > >
> > >>>>>But this would mean, that a stereotype would be needed for every
> > >>>>>possible blocktype. This wouldn't be a flexible solution as new
> > >>>>>blocktypes can be defined any time, and the creation of new
> > >
> > > stereotypes
> > >
> > >>>>>would be forced and cumbersome. I would appreciate a solution,
where
> > >
> > > the
> > >
> > >>>>>stereotypes needed for this domain specific modeling, are minimal
in
> > >>>>>quantity and size. Ideally this mapping would be wishful: Parameter
> of
> > >
> > > a
> > >
> > >>>>>Block -> Property of an Action
> > >>>>>
> > >>>>>Is there something about actions and activities that I missed to
> > >
> > > realize
> > >
> > >>>>>a correct mapping? Or should I try another approach, for example:
> > >>>>>dynamic simulation model -> Class containing references to all
blocks
> > >>>>>included in the dynamic model, blocks -> Instances of classes,
Edges
> > >>>>>between blocks-> InformationFlows between instances  ?
> > >>>>>
> > >>>>>I would appreciate any help.
> > >>>>>
> > >>>>>Axel
> > >>>>>
> > >>>>>
> > >>>>>
> > >>>>>
> > >>>>>
> > >>>>
> > >>>>
> > >>>>
> > >>
> > >>
> > >
> > >
> >
> >
>
>
> --------------------------------------------------------------------------
--
> ----
>
>
>
>
>
>


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