Hi Miso One other idea that was discussed on jena-dev earlier (which i cannot seem to find) was to use Sparql queries to represent events, create an inverted index of the predicates mentioned in the query, and register a model listener for changes to triples. The listener can then look up the inverted index and run the subset of sparql queries to generate events. Further optimizations are possible to improve upon the inverted index over predicates using information from sparql algebra.
The approach maintains the expressivity and performance of sparql and is a starting point for research in my opinion. Regards, Sanjay On Oct 27, 2011, at 3:55 PM, Miso Tomovski <[email protected]> wrote: > Thanks a lot . It is what I needed most. > > > > ________________________________ > From: Paolo Castagna <[email protected]> > To: [email protected] > Sent: Thursday, October 27, 2011 9:33 PM > Subject: Re: Examples > > Paolo Castagna wrote: >> Miso Tomovski wrote: >>> Hello jena users, I am working on a graduation project in computer science >>> and technology, on a subject - Social networks powered by Semantic Web , >>> using java and mysql. I am quite new in Jena, and my question is, where can >>> I find some web app examples written in java, or social network ontologies, >>> regarding my subject. Particularly I am interested in using the Jena API >>> with MySQL, dealing with performance, concurrency, scalability issues. I've >>> spent some time looking on the internet, but found nothing in specific. >>> Thanks a lot in advance. Best regards, >>> Miso >>> >> >> Hi Miso, >> welcome to jena-users, you found the right mailing list. >> >> Not a complete answer to your questions, however... >> >> The documentation about Jena is here: >> http://incubator.apache.org/jena/ >> >> You might find Fuseki (which uses TDB) an useful alternative >> instead of SDB with MySQL: http://openjena.org/wiki/Fuseki >> >> Make sure you do not miss FOAF and SIOC vocabularies, here: >> http://schemapedia.com/tags/social > > Ops... forgot the homepages: > > - http://www.foaf-project.org/ > - http://sioc-project.org/ > > ... and: > > - http://developers.facebook.com/docs/opengraph/ > > >> >> Paolo >> >>
