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Re: Should support querying RDF lists

From: Pavel Klinov <pavel@stardog.com>
Date: Wed, 12 Jul 2017 13:08:15 +0200
Message-ID: <CAJ-ZGXoqWqWqmmGmX-6gnkEppVoi=9GX90=j-xTVpDC6pHBqRg@mail.gmail.com>
To: Victor Porton <porton@narod.ru>
Cc: public-sparql-dev@w3.org
On Wed, Jul 12, 2017 at 2:08 AM, Victor Porton <porton@narod.ru> wrote:

> Why does SPARQL 1.1 not contain requesting an ordered RDF list
> (rdf:first/rdf:rest/rdf:nil)?!
> It is a highly useful feature. I am to using it in my software.

Well, no disrespect, but this isn't quite a strong evidence of utility...

> There is ORDER BY, but it seems it cannot be used for this kind of
> query.

You can implement most basic operations, e.g. accessing the n-th element or
all elements, using property paths. It may not be completely trivial but
it's not rocket science either. [1] is a good reference.


[1] http://www.snee.com/bobdc.blog/2014/04/rdf-lists-and-sparql.html

> Let's discuss how to make such an extension to SPARQL.
Received on Wednesday, 12 July 2017 12:56:31 UTC

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