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Re: Descendants

From: Alex Muir <alex.g.muir@gmail.com>
Date: Tue, 8 Apr 2014 04:36:44 -0400
Message-ID: <CAFtPEJZDYsHTUKUBYpF3TYqQA78YtW32PyQeREfgmOLfx52aHQ@mail.gmail.com>
To: Markus Kroetzsch <markus.kroetzsch@tu-dresden.de>
Cc: public-sparql-dev@w3.org
Thanks guys,,

I don't see descendant examples in the spec but perhaps I'm not
searching for the correct terms.

I'll have to keep reading more to understand this..




On Mon, Apr 7, 2014 at 8:05 AM, Markus Kroetzsch
<markus.kroetzsch@tu-dresden.de> wrote:
> Hi Alex,
>
> You can use SPARQL 1.1 *property paths* for getting all descendants of a
> node. Examples should be findable online, for example in the W3C documents
> on SPARQL 1.1.
>
> Regards,
>
> Markus
>
>
> On 07/04/14 12:37, Alex Muir wrote:
>>
>> Hi,
>>
>> I've recently set up jena and imported an rdf file which is exported
>> from Semantic Media Wiki. I've been reading through SPARQL tutorials
>> and searching online but I haven't come across much in the way of
>> example queries that are used to return for example in this case a
>> subject and subjects of it's children or even more complex a subject
>> and all it's descendant subjects which thus far I feel from what I've
>> read is not possible. Is that the case?
>>
>> Can you point me to any resources that would help me understand how to
>> build such queries?
>>
>> Here is a snippet of the rdf input.
>>
>> Multiple  property:ChildElement can exist within each subject.
>>
>> <swivt:Subject
>> rdf:about="http://elt.kode1100.com/wiki/index.php/Special:URIResolver/ELT-3ALevel.doors">
>>          <rdf:type rdf:resource="&wiki;Category-3AElements"/>
>>          <rdfs:label>ELT:Level.doors</rdfs:label>
>>          <swivt:page
>> rdf:resource="http://elt.kode1100.com/wiki/index.php/ELT:Level.doors"/>
>>          <rdfs:isDefinedBy
>>
>> rdf:resource="http://elt.kode1100.com/wiki/index.php/Special:ExportRDF/ELT:Level.doors"/>
>>          <swivt:wikiNamespace
>>
>> rdf:datatype="http://www.w3.org/2001/XMLSchema#integer">4</swivt:wikiNamespace>
>>          <property:ChildElement rdf:resource="&wiki;ELT-3AQuestion.doors"/
>>
>>
>> Regards
>>
>
> --
> Markus Kroetzsch
> Faculty of Computer Science
> Technische Universitšt Dresden
> +49 351 463 38486
> http://korrekt.org/



-- 
-

Alex Muir
http://ca.linkedin.com/pub/alex-muir/36/ab7/125
Received on Tuesday, 8 April 2014 08:37:11 UTC

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