[ogsa-wg] [OGSA-D-WG] Definition of "data service"

[Geoffrey Fox]

As a somewhat irrelevant aside, I find the OGC (Open Geospatial 
Consortium) specification of as Web Feature Service as helpful in 
suggesting a general structure of a data service.

Donal K. Fellows wrote:
> guru prasad wrote:
>   
>> I have the following opinion about the proposed definition for a data 
>> service: "A service that exposes the capabilities or data of one or more 
>> data resources within a service-oriented architecture."
>>     
>
> I'm trying to understand why there should be a distinction between
> "capabilities" and "data" in this context. Data's interesting for what
> you can do with it. :-)
>
>   
>> The definition just tells me that Data Service just exposes the 
>> capabilities and/or data of data resource(s). But, it does not tell me 
>> if I can access this service to invoke those capabilities or the data of 
>> a data resource.
>>     
>
> It's exposing the capabilities, not (necessarily) a description of them.
>
>   
>> If this is true, then, 'service' is too strong a term. 
>> It should be 'data resource descriptor'. Else, 'service that exposese 
>> the capabilities or data' has to be rephrased. Because it is not only 
>> exposing but also allowing the user to access those capabilities.
>>     
>
> A capability isn't exposed if it isn't (at least in principle) accessible.
>
> Donal.
>
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>   

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