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Re: SPARQL Protocol: application/sparql-query requests

From: Elias Torres <elias@torrez.us>
Date: Fri, 30 Mar 2007 15:14:39 -0400
Message-ID: <460D619F.3000006@torrez.us>
To: Bjoern Hoehrmann <derhoermi@gmx.net>
CC: Kendall Clark <kendall@monkeyfist.com>, public-rdf-dawg-comments@w3.org

Bjoern Hoehrmann wrote:
> * Kendall Clark wrote:
>> That text appears in an informative section of the document only (all  
>> the examples are marked as informative), so
>> there is no implication whatever that posting SPARQL syntax docs is  
>> "a bad thing".
>>
>> There are several features or aspects of several examples that are  
>> not necessarily specified but are given so as to
>> make the examples more realistic, or more reflective of best  
>> practice, etc. None of those are discussed explicitly
>> because they are not germane to the specification normative sections.
> 
> I don't understand your response. I did not cite any specific text or
> example of the specification; I am asking why using
> 
>   POST /sparql/ HTTP/1.1
>   Host: www.example
>   User-agent: my-sparql-client/0.1
>   Content-type: application/xml
> 
>   ...
> 
> is good, and using
> 
>   POST /sparql/ HTTP/1.1
>   Host: www.example
>   User-agent: my-sparql-client/0.1
>   Content-type: application/sparql-query
> 
>   ...
> 
> is not so good. I said that this seems to be a bad thing because the
> interface does not allow it and because "The queryHttpGet binding should
> be used except in cases where the URL-encoded query exceeds practical
> limits, in which case the queryHttpPost binding should be used." To be
> yet more precise, why
> 
>    <operation ref="tns:query" wsdlx:safe="true" whttp:method="POST" 
>       whttp:inputSerialization="application/x-www-form-urlencoded,
>                                 application/xml" ...
> 
> and not
> 
>    <operation ref="tns:query" wsdlx:safe="true" whttp:method="POST" 
>       whttp:inputSerialization="application/x-www-form-urlencoded,
>                                 application/sparql-query,
>                                 application/xml" ...
> 
> ?

Bjoern, we have been doing some research [1] into this issue and did not
come up with a reasonable solution to your request yet. I have emailed
the WS-description WG asking them for advice [2] and am waiting to hear
back from them. At the moment, there is not much we can do, but if you
have any new insights, we are all ears. Once I get a response from the
WSDL WG, I will post the list with the updates so please stay tuned.

-Elias

[1]http://lists.w3.org/Archives/Public/public-rdf-dawg/2007JanMar/0112
[2]http://lists.w3.org/Archives/Public/public-ws-desc-comments/2007Mar/0009.html
Received on Friday, 30 March 2007 19:15:00 GMT

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