[CNST] CNST Telecon - June 28

[Peter Shames]

The RASDS describes how to depict service interfaces, but it is  
rather abstract.  it also describes how to depict service interfaces  
from different viewpoints, as we have been doing.  The TERMA guy  
(Gert Villemos, I presume) wanted some sort of service interface spec  
that looked more like what RM-ODP defined.  This is essentially a  
service interface / binding spec, which is indeed useful, but is of  
more value from a software architecture view than from an  
interoperability view.

We could provide such a spec if we determined that it was really  
useful for interoperability.   However, as i've pointed out before,  
the Internet has interoperability up the wazoo without a single  
interface spec, and JMS has all sorts of interface (API) specs, but  
no interoperability.  You can have both, but one does not give you  
the other.

Peter



On Jun 28, 2007, at 7:01 AM, Adrian J. Hooke wrote:

> Also, the guy from TERMA here points out that if we are talking  
> about a service infrastructure, we need to first formally define  
> "what is a service?", i.e., we need a clear and standard way to  
> approach the identification and specification of a service. Does  
> any current CCSDS work address this?
>
> ESA's view is that we need an e2e architecture, that exposes "back  
> end" services from control centers and "front end" services in  
> space, as well as our current "middle" services.
>
> ///a
>
>
>
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_______________________________________________________

Peter Shames
Manager - JPL Data Systems Standards Program
InterPlanetary Network Directorate
Jet Propulsion Laboratory, MS 301-230
California Institute of Technology
Pasadena, CA 91109 USA

Telephone: +1 818 354-5740,  Fax: +1 818 393-0028

Internet:  Peter.Shames at jpl.nasa.gov
________________________________________________________
"We shall not cease from exploration, and the end of all our exploring
will be to arrive at where we started, and know the place for the  
first time"

                                                                         
                       T.S. Eliot