On 27/04/2015 21:41, Andrea Gazzarini wrote:
Hi guys,
I'd like to share with you a project (actually a hobby for me) where I'm
spending my free time, maybe someone could get some idea or benefit from it.
https://github.com/agazzarini/SolRDF
I called it SolRDF (Solr + RDF): It is a set of Solr extensions for
managing (indexing and querying) RDF data.
As a first step I wrote a set of classes for injecting Apache Jena RDF
cababilities in Solr.
Hi Andrea,
Interesting...we've been working with Jena and SPARQL queries as part of
our BioSolr project: we presented on this in London last week (includes
links to slides and code):
http://www.flax.co.uk/blog/2015/04/24/lucenesolr-london-meetup-biosolr-and-query-deep-dive/
Cheers
Charlie
That allows to
- index RDF data using one of the standard formats (n-triples, rdf+xml,
turtle)
- query those data using SPARQL, the RDF query language
Trying all of that is just a matter of two minutes, as illustrated in this
post [1]. Follow those five steps and Solr will quickly act as a fully
compliant SPARQL 1.1 endpoint.
On top of that, I'm going further with the development of what I called
"Hybrid mode", where Solr capabilities, like faceting, can be applied to an
RDF Dataset queried using SPARQL. You can read more about this in this post
[2] or in the project Wiki [3]. Two kinds of facets (object and range
object faceting) are already working and available in the master; I'd like
to integrate pivot and interval facets, too.
As I said this is just an amusement for me (and a great chance to explore
how Solr works behind the scenes) so I'm gradually and slowly going ahead,
making available only "stable" features.
Any feedback / idea / comment / question is warmly welcome ;)
Best,
Andrea
[1]
http://andreagazzarini.blogspot.it/2014/12/a-solr-rdf-store-and-sparql-endpoint-in.html
[2]
http://andreagazzarini.blogspot.it/2015/04/rdf-faceting-with-apache-solr-solrdf.html
[3] https://github.com/agazzarini/SolRDF/wiki/Faceted%20search
--
Charlie Hull
Flax - Open Source Enterprise Search
tel/fax: +44 (0)8700 118334
mobile: +44 (0)7767 825828
web: www.flax.co.uk
