Solr + RDF = SolRDF

[Andrea Gazzarini]

Hi guys,
I'd like to share with you an interesting project, maybe someone could get some idea or benefit from it. The topic is more or less the same, rounding around Sematic Web and Linked Data, and that's the reason why I'm posting here on CumulusRDF user list.

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.

That allows to

• index RDF data using one of the standard formats (e.g. n-triples, rdf+xml, turtle)
  
• query those data using SPARQL 1.1
  

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. 

In case you're interested please join us on solrdf-user-list@googlegroups.com and let me know your feedback / idea / comment / question

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