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Re: Template language for SPARQL?

From: Mark Wallace <mwallace@modusoperandi.com>
Date: Fri, 01 Jun 2012 22:51:02 -0400
Message-ID: <4FC97F96.8000202@modusoperandi.com>
CC: David Booth <david@dbooth.org>, semantic-web <semantic-web@w3.org>
We've used a very simple approach as well.  We typically have just used 
positional parameters, numbered %1, %2, etc.

E.g., a query template would be defined like this:

    PREFIX foaf: <http://xmlns.com/foaf/0.1/>
    select ?a ?b
    where {
    <%1>  foaf:name ?name  .
    <%1>  foaf:workplaceHomepage <%2> .
    }

and we string replace the %1 and %2 with URLs at run time to tailor the 
query.


On 6/1/2012 4:10 AM, Bill Roberts wrote:
> Hi David
>
> Thanks to Paul for mentioning our blog post from a few weeks ago. We felt the same need as you and set up a simple approach to substitute URL parameters into a sparql query. We've found it very handy.
>
> If something like this was included in the standards then we'd be happy to adapt to follow that standard.
>
> Bill
>
> Sent from my iPhone
>
> On 1 Jun 2012, at 07:57, Paul Hermans<paul@proxml.be>  wrote:
>
>> David,
>>
>> See
>> http://blog.swirrl.com/articles/new-publishmydata-feature-named-queries
>>
>> Paul
>>
>> On 01 Jun 2012, at 03:45, David Booth wrote:
>>
>>> [Resending, as my previous message never showed up.]
>>>
>>> I would like to be able to write something like this:
>>>
>>> SELECT ?s
>>> WHERE { ?s a ${CLASS} . }
>>>
>>> and have ${CLASS} substituted in from an environment variable or other
>>> parameter, but SPARQL does not currently provide anything like this, and
>>> it's clearly beyond what the working group could put in SPARQL 1.1.
>>> So I'm wondering . . .
>>>
>>> What have others been using as a template language for SPARQL?
>>>
>>> I know TopQuadrant uses an RDF representation for SPARQL CONSTRUCT
>>> queries in conjunction with SPIN,
>>> http://www.w3.org/Submission/2011/02/
>>> but it shreds the SPARQL query into tiny RDF pieces, which is rather
>>> unfriendly for a human to read.  It would be much nicer to have
>>> something like the above.
>>>
>>> How are others handling the need to parameterize their SPARQL queries
>>> like this?
>>>
>>>
>>>
>>> -- 
>>> David Booth, Ph.D.
>>> http://dbooth.org/
>>>
>>> Opinions expressed herein are those of the author and do not necessarily
>>> reflect those of his employer.
>>>
>>>
>>
>> Kind Regards,
>> Paul Hermans
>>
>> -------------------------
>> ProXML bvba
>> XML and OWL/RDF services
>> (w) www.proxml.be
>> (b) experiences and opinions
>> (e) paul@proxml.be
>> (t)  +32 15 23 00 76
>> (m) +32 473 66 03 20
>>
>> Narcisweg 17
>> 3140 Keerbergen
>> Belgium
>>
>>
>>
>>
>>
>>
>>
>>

-- 
Mark Wallace
Principal Engineer, Semantic Applications
Modus Operandi, Inc.
709 S. Harbor City Blvd., Suite 400
Melbourne, FL 32901-1936, USA
(321) 473-1400 ext 1442
mwallace@modusoperandi.com
www.modusoperandi.com
	
	I'm speaking at SemTech 2012! 
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Received on Saturday, 2 June 2012 02:51:32 GMT

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