[Fiware-i2nd] R: USDL and Modelling in FI-WARE

[jeanpierre.lerouzic at orange.com]

Hi all,

 

I think there is some misunderstanding here.

Thomas said these two tools can't be compared or are not interchangeable:

·         It seems to me USDL is about large business process modeling, which means much larger conceptual realms than the much simpler simple services that are modelized with UML. I may be wrong about USDL actual possibilities but UML is not a universal solution: How do you quickly model non functional properties such as security, business or operation in UML? How can you share requirements with people that have expertise that you don't have (for example marketing) in UML? How to integrate in a UML model apparently contradictory requirements made by separate team of experts such as security team asking for closed devices and marketing team asking of opened devices?

·         Probably it's the whole of Fi-ware that should be modeled in USDL, where each WPs and tasks should use UML.

 

Indeed I am not a specialist of both tools.

 

Best regards,

 

Jean-Pierre

 

 

 

 

De : fiware-i2nd-bounces at lists.fi-ware.eu [mailto:fiware-i2nd-bounces at lists.fi-ware.eu] De la part de DONADIO, PASQUALE (PASQUALE)
Envoyé : mercredi 12 octobre 2011 16:38
À : Marco Castrucci; Bohnert, Thomas Michael; fiware-i2nd at lists.fi-ware.eu
Cc : Kadner, Kay; Heller, Markus; Leidig, Torsten
Objet : [Fiware-i2nd] R: USDL and Modelling in FI-WARE

 

Dear all,

 

>From an industrial point of view, and personal experience, Unified Modeling Language is considered the standard de facto for the design of each kind of software component, packages platforms and services.

 

The set of diagrams, also named "Use case diagrams", "State diagrams", "Sequence diagrams" etc...provides a general purpose set of design tools useful to describe each kind of software systems.

 

UML design is moreover supported by many software tools (e.g. StarUML, ArgoUML, Rational/IBM products, etc)

 

On the other hand, USDL seems a service oriented design language only, containing a subset of the UML formalisms. Finally USDL tools seems not yet mature respect the UML tools listed above

 

So, in my opinion, the UML language should be considered the best choice for our software design.

 

Best Regards

 

Pasquale

________________________________

Da: fiware-i2nd-bounces at lists.fi-ware.eu [mailto:fiware-i2nd-bounces at lists.fi-ware.eu] Per conto di Marco Castrucci
Inviato: mercoledì 12 ottobre 2011 16.03
A: Bohnert, Thomas Michael; fiware-i2nd at lists.fi-ware.eu
Cc: Kadner, Kay; Heller, Markus; Leidig, Torsten
Oggetto: Re: [Fiware-i2nd] USDL and Modelling in FI-WARE

 

Dear Thomas, 

 

thanks for your input!

In addition, I'd like to suggest also to have a look to this paper: Cardoso, Winkler, Voigt "A service description language for the Internet of Services": http://eden.dei.uc.pt/~jcardoso/Research/Papers/ISSS-2009-Serv-Desc-Lang-for-the-IoS.pdf.

 

What is still not so clear to me is how to model technical aspects with USDL.

In the email you attached, I see that WP3 is using yEd tool for that. I had a look at yEd and I see that it also offers some utilities to draw UML diagrams (even if it is not so complete compared to other tools like StarUML).

 

Thus, is it right to conclude that, for the modelling of technical aspects, we don't need to use the USDL tool but we shall use other tools (like for example yEd or StarUML)? This means that we can use USDL for the global description of the service (business, legal aspects, etc.) and UML for its technical description?

 

Thank you in advance.

Best regards

Marco

 

 

	----- Original Message ----- 

	From: Bohnert, Thomas Michael <mailto:thomas.michael.bohnert at sap.com>  

	To: fiware-i2nd at lists.fi-ware.eu 

	Cc: Kadner, Kay <mailto:kay.kadner at sap.com>  ; Heller, Markus <mailto:markus.heller at sap.com>  ; Leidig, Torsten <mailto:torsten.leidig at sap.com>  

	Sent: Wednesday, October 12, 2011 11:22 AM

	Subject: [Fiware-i2nd] USDL and Modelling in FI-WARE

	 

	Dear I2ND Members,
	
	With reference to the call this morning here are some infos about USDL and general process/program design/modeling.
	
	USDL:
	Landing page: www.internet-of-services.com
	Short intro: M. Heller, T. M. Bohnert, A. Friesen, "A Unified Service Description Language (USDL) (slides)", 3rd FI-PPP Usage Area Workshop", Brussels, Belgium, Jun 2011 http://dl.dropbox.com/u/43706589/USDL_Heller_tmb.pdf
	Technical contact: M. Heller (WPL) / T. Leidig (WPA) / K Kadner (USDL W3C IC Chair). I suggest to schedule a USDL-briefing very soon. Also in order to address you concerns with respect to the stability and maturity of USDL in particular.
	
	Modeling:
	USDL is NO alternative to UML. Instead, for modeling your technical aspects you may consider the approach and tooling adopted in the Apps chapter. Precise info with real examples are attached.
	
	Questions/Comments welcome.
	
	Best - Thomas
	 
	--
	Thomas Michael Bohnert
	Technical Director
	SAP (Schweiz) AG, Kreuzplatz 20, 8008 Zurich, Switzerland
	T +41 58 871 7801, M +41 79 7018941, F +41 58 871 7812
	email: thomas.michael.bohnert at sap.com
	web: tmb.nginet.de, twitter: tmbohnert
	
	Please consider the impact on the environment before printing this e-mail.

	
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