Re: [soa-rm] FW: SOA Reference Model

On 2/6/06, Jeffrey A Estefan <Jeffrey.A.Estefan@jpl.nasa.gov> wrote:

Duane,

Layering (and Tiering!) will be an integral archiectural tenet of the SOA
Ref Arch.  I do not believe we need to add such concepts to the abstract
"service" definition that has been captured in the SOA-RM spec.

My two cents.

- Jeff

==============

Some praise of our work and thoughts for the RA...courtesy of Jos.

*******************************
Adobe Systems, Inc. - http://www.adobe.com
Vice Chair - UN/CEFACT  http://www.uncefact.org/
Chair - OASIS SOA Reference Model Technical Committee
Personal Blog - http://technoracle.blogspot.com/
*******************************

> -----Original Message-----
> From: Duane Nickull [mailto:dnickull@adobe.com]
> Sent: woensdag 1 februari 2006 16:25
> To: Vrancken, Jos
> Subject: RE: SOA Reference Model
>
>
> Hello Jos:
>
> First - thank you for taking the time to write in.  Now I am
> curious to read your presentation ;-)
>
> The SOA RM is purely abstract, hence there is no concrete
> aspects of a service to use as metrics such as
> generality/specialized.  Any mention of such would be merely
> incidental.
>
> However - we do plan to do this in greater detail in the SOA
> Reference Architecture.  Your layered diagrams would be most
> useful to that sub group and I would ask if I may forward
> your email to that group.  I am sure they would appreciate them.
>
> Duane
>
> *******************************
> Adobe Systems, Inc. - http://www.adobe.com
> Vice Chair - UN/CEFACT   http://www.uncefact.org/
> Chair - OASIS SOA Reference Model Technical Committee
> Personal Blog - http://technoracle.blogspot.com/
> *******************************
>
>
> -----Original Message-----
> From: Vrancken, Jos [mailto:j.vrancken@tbm.tudelft.nl]
> Sent: Wednesday, February 01, 2006 6:30 AM
> To: Duane Nickull
> Subject: SOA Reference Model
>
> Hello Duane,
> I just read your presentation on the SOA Reference Model.
> Very interesting indeed!
> It has several points in accordance with a presentation that
> I gave recently on application integration using semantic
> web services, and that is
> usually a very positive sign, as we had no prior contacts about this.
> Points of accordance were
> - importance of layer diagrams
> - crisscross relationships between adjacent layers in layer diagrams
> - the two aspects behavior and information of a service
> - the importance of architecural models
>
>
> May I make a proposal for the core definition of SOA.
> That is about the service notion.
>
> The point is: useful things are both very general and very
> specific. The service notion as defined in your presentation
> is sufficiently general but it still lacks, IMHO, specificity.
> We can make it more specific without falling in the
> trap of specific technologies.
> The whole subject is about implementing services in software.
> My proposal for the definition of a service is: a service is
> the capability of a software component with a layered
> interface. The layeredness applies to both aspects of
> the interface: the information and the behavior.
> Good interfaces are essential for effective modularization
> and decoupling of components. So is layeredness. And when
> the interfaces themselves are layered, that is probably the best
> one can achieve in terms of modularity, independence and
> reduced change propagation.
>
> In the case of Web Services the two layer diagrams,
> for information and for behavior may look as follows:
>
> Information:
>
> _______________
> specific format
> _______________
> XML-Schema
> _______________
> XML
> _______________
> Unicode
> _______________
> Bytes
> _______________
>
>
>
> Behavior:
>
> ________________________________
> specific interaction
> ________________________________
> composite interaction
> ________________________________
> synch. and asynch. communication
> ________________________________ asynch interaction
> ________________________________
>
>
>
> Could this idea be of some value for the SOA Reference Model?
> Then I would like to participate in some way in your TC.
>
>
> Kindest regards / Met vriendelijke groet,
>
> Jos Vrancken
>
> Sectie ICT, TBM, TU-Delft
> Jaffalaan 5
> 2628 BX Delft
> P.O. Box 5015
> 2600 GA Delft
> telephone 06-51402799 / 015-2781566
> room B2.310
>
>

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