OK Thank you for pointing out this information. My work with Solr is not formally associated with the project, it is merely part of my ongoing research and is very much in production. To give you an indication I provide the link below which shows a previous effort, this was used to provide query refinement based on data stored in a Lucene index (which is now removed from the Nutch project as indexing and search has been delegated to Solr)
http://wiki.apache.org/nutch/OntologyPlugin When I have something more stable I will gladly get in touch and make the code available for everyone. Lewis ________________________________________ From: Paolo Castagna [[email protected]] Sent: 17 March 2011 08:14 To: [email protected] Subject: Re: ARQ + Lucene McGibbney, Lewis John wrote: > Hi Paolo, > > First and foremost I apologise upfront for talking off-subject here in > regards to Jena in specific. > > I am currently working on a plug-in for Solr which refines user queries based > on ontology classes and I am using Jena to wrap around my ontology models to > provide this functionality. > Immediately I am interested in experimenting with LARQ and SARQ. > > Out of curiosity, can you please provide some use case or personal usage for > these frameworks as it would enable me to get at least an abstract sense of > how I may be able to use LARQ, > prior to SARQ for my own needs. The use cases for SARQ or EARQ are exactly the same as the ones for LARQ (since they implement exactly same functionalities but with a different indexing solution behind). One use case could be: you want to quickly find, for example, all the "things" which have the word "nuclear energy" in any of their literals. Other RDF stores implement similar functionalities, see: http://www.w3.org/wiki/SPARQL/Extensions/Computed_Properties This is just pure and plain vanilla free text searches: given some keywords, you retrieve a ranked list of the first X literals containing those keywords/words. It's not what some call "semantic search", no ontologies are involved, no NLP, etc. Can you point me at the Solr plug-in you are working on? Thanks, Paolo Glasgow Caledonian University is a registered Scottish charity, number SC021474 Winner: Times Higher Education’s Widening Participation Initiative of the Year 2009 and Herald Society’s Education Initiative of the Year 2009. http://www.gcu.ac.uk/newsevents/news/bycategory/theuniversity/1/name,6219,en.html Winner: Times Higher Education’s Outstanding Support for Early Career Researchers of the Year 2010, GCU as a lead with Universities Scotland partners. http://www.gcu.ac.uk/newsevents/news/bycategory/theuniversity/1/name,15691,en.html
