- From: James Leigh <james-nospam@leighnet.ca>
- Date: Fri, 08 Jun 2012 13:58:14 -0400
- To: David Booth <david@dbooth.org>
- Cc: semantic-web <semantic-web@w3.org>
On Thu, 2012-05-31 at 21:45 -0400, 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?
>
>
>
In Callimachus we have created four types of query parameters for use
with query string parameters. You can read about them here:
http://code.google.com/p/callimachus/wiki/NamedQueries#Parameters
Cheers,
James
Received on Friday, 8 June 2012 17:58:39 UTC