Claude,
Thanks for offering to help!
The expression:
(?a ?b ?c) :hasMagicProperty ?this .
Is SPARQL 1.1 syntactic sugar for:
_:b0 rdf:first ?c ;
rdf:rest rdf:nil .
_:b1 rdf:first ?b ;
rdf:rest _:b0 .
_:b2 rdf:first ?a ;
rdf:rest _:b1 ;
:hasMagicProperty ?this .
See the RDF Collections section of the spec:
http://www.w3.org/TR/2013/REC-sparql11-query-20130321/#collections
For my use case, I don't need to know about the expanded form; I just want to
render a SPARQL query that uses the "(?a ?b ?c)" list syntax.
In the example query, I am using a magic property to identify values of
"?this", based on a SPIN magic property which has 3 input arguments. I have
updated the SPARQL in my stackoverflow post slightly so the intent is more
clear.
I figured out a workaround, which uses "addWhere()" recursively to write out
the expanded form of the RDF collection construct (using the anonymous nodes,
as above).
I posted this workaround code as an answer on stackoverflow, but it's a stopgap
solution. A querybuilder enhancement to support the sugary list () syntax would
be awesome. =)
Please let me know if this gives you enough info.
James and Andy, thanks for your help, too.
Russell Morrisey
Java Developer | CLS Platform Team
[email protected]
cscglobal.com
Making Business Possible – Worldwide
-----Original Message-----
From: Andy Seaborne [mailto:[email protected]]
Sent: Wednesday, October 28, 2015 8:38 AM
To: [email protected]
Subject: Re: How do I build a SPARQL list input using jena querybuilder?
and to see the same locally,
qparse --print=op --file <query>
Andy
On 28/10/15 12:03, james anderson wrote:
> good morning;
>
>> On 2015-10-28, at 12:41, Claude Warren <[email protected]> wrote:
>>
>> I replied on stackoverflow but am wondering exactly how would ARQ
>> parse the statement
>>
>> SELECT * WHERE {
>> (?a ?b ?c) :hasMagicProperty ?result .
>> }
>
> sparql.org says, as to be expected:
>
> 1 (base <http://example/base/>
> 2 (prefix ((: <http://spinning/onwards>))
> 3 (bgp
> 4 (triple ??0 <http://www.w3.org/1999/02/22-rdf-syntax-ns#first> ?a)
> 5 (triple ??0 <http://www.w3.org/1999/02/22-rdf-syntax-ns#rest> ??1)
> 6 (triple ??1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#first> ?b)
> 7 (triple ??1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#rest> ??2)
> 8 (triple ??2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#first> ?c)
> 9 (triple ??2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#rest>
> <http://www.w3.org/1999/02/22-rdf-syntax-ns#nil>)
> 10 (triple ??0 :hasMagicProperty ?result)
> 11 )))
>
>>
>> what is the expected query?
>
> to find some sort of computed relation between a three-element list(s) and
> some other node.
>
>>
>>
>> On Tue, Oct 27, 2015 at 7:58 PM, Morrisey, Russell <
>> [email protected]> wrote:
>>
>>> I have a bunch of code that uses SelectBuilder to build up a complex
>>> SPARQL query. In my query, I want to use a SPIN magic property
>>> that’s invoked like this:
>>>
>>>
>>>
>>> (?a ?b ?c) :hasMagicProperty ?result .
>>>
>>>
>>>
>>> I can’t figure out how to represent the list syntax (?a ?b ?c) using
>>> SelectBuilder. I’ve tried several approaches using java lists,
>>> strings and trying to figure out RDFList, but I’m still struggling.
>>>
>>>
>>>
>>> I posted the problem in more detail on stackoverflow:
>>>
>>>
>>> http://stackoverflow.com/questions/33351102/how-to-i-build-a-sparql-
>>> list-input-using-jena-querybuilder
>>>
>>>
>>>
>>>
>>>
>>> *Russell Morrisey*
>>> *Java Developer | CLS Platform Team*
>>> *Phone* *302-636-5400 <302-636-5400> x62899*
>>>
>>> [email protected]
>>> cscglobal.com
>>>
>>> [image:
>>> http://wiki/download/attachments/13879359/CSC+logo+for+sig+line.jpg?
>>> version=1&modificationDate=1411058694237]
>>>
>>> *Making Business Possible – Worldwide*
>>>
>>> *New York Law Journal** Reader Rankings*
>>>
>>> *CSC named* *#1 for Entity Management* *and* *#1 for Matter
>>> Management*
>>> *by* *The New York Law Journal.* Click here
>>> <https://www.cscglobal.com/global/web/csc/nylj-rankings.html> *to
>>> learn
>>> more!*
>>>
>>>
>>>
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>>
>>
>>
>> --
>> I like: Like Like - The likeliest place on the web
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>> LinkedIn: http://www.linkedin.com/in/claudewarren
>
>
>
> ---
> james anderson | [email protected] | http://dydra.com
>
>
>
>
>
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