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Re: Question about doing RDF analysis in Ruby

From: Ben Lavender <blavender@gmail.com>
Date: Mon, 31 Jan 2011 20:11:03 +0100
Message-ID: <AANLkTin=w-JFCej5fGKjRvLV_G+QvnTJbCstUM9yXKo5@mail.gmail.com>
To: public-rdf-ruby@w3.org
Greg,

I'm understanding this as you want a single RDF::Repository that
represents multiple RDF::Repositories in a few different couchDB
installations. In this case, SPARQL won't help you meet that API, as
that API has functions that SPARQL does not (certainly not SPARQL 1.0
anyway).  You'd need to just make an RDF::Repository that sends out
each operation to the sub-repositories and merges the results. This
has been on my personal roadmap and I just haven't made the time.
Shouldn't be a big deal, and I'd push to include such a repository in
the linkeddata gem if you wanted to release it.

Ben

On Mon, Jan 31, 2011 at 7:34 PM, Greg Lappen <greg@lapcominc.com> wrote:
> Hello,
> We are using RDF.rb now for persisting RDF data into our CouchDB
> RDF::Repository.  We believe that we will be splitting the data into
> different repositories in order to shard and distribute the data between
> different locations, but we are definitely interested in doing analysis and
> inferences on the data spanning multiple repositories.  What is the general
> approach for doing this kind of thing with RDF.rb?  Is there a SPARQL
> implementation for RDF.rb that would help with this?  Or would we have to
> write ruby code to walk the repos and do the queries programatically?
> Thanks!
> Greg
Received on Monday, 31 January 2011 19:11:56 GMT

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