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Re: minor technical on 9 Specifying RDF datasets

From: Richard Newman <r.newman@reading.ac.uk>
Date: Thu, 12 Jan 2006 15:23:00 -0800
Message-Id: <129B9E25-DAF5-4B25-A583-8343F41CA76A@reading.ac.uk>
Cc: public-rdf-dawg-comments@w3.org
To: Fred Zemke <fred.zemke@oracle.com>

I think the idea is to consider it as overriding, rather than  
scoping. Consider: if the protocol can override the query's defaults,  
then one can re-use a query, supplying variable datasources in the  
protocol request without having to re-formulate the query.

What might be useful is allowing a means of augmentation, as well as  
substitution; otherwise, it's likely that *either* protocol dataset  
specifications *or* query dataset specifications will be used, but  
not both.


On 12 Jan 2006, at 09:33, Fred Zemke wrote:

> 9. Specifying RDF datasets
> first para, last sentence "The RDF dataset may also be specified in a
> SPARQL protocol request, in which case the protocol description  
> overrides
> any description in the query itself."  This rule violates the usual
> assumption about scoping, that the innermost specification of  
> something
> should prevail over specification that occur in an outer scope.  In
> this case, the protocol layer is an outer scope and the query itself
> is carried within the protocol, so one would expect that the protocol
> could provide defaults, but that the query itself should have the  
> final
> say.
> Fred Zemke
Received on Thursday, 12 January 2006 23:23:02 UTC

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