Hi Chris, We were currently leaning towards open-source triple stores. As far as inferencing goes, I suspect we will be doing at least transitive closures on rdfs:subClassOf and rdfs:subPropertyOf properties. I will look into TinkerPop. Are you currently using it, and for what purpose? I am also curious about what types of data model changes did you have to do to improve your rdf store's performance.
Thanks, Ravi On May 29, 2012, at 2:43 AM, Chris Fitzpatrick wrote: > Hi Ravi, > > Yeah, if you haven't seen it yet, take a look at the first link > (http://www.w3.org/wiki/LargeTripleStores) in the search results that > Stefano included. > > A big question is if you're going to need reasoning capabilities. If > that's the case, you'll probably want to look at the first 3 in that > list (Allegro from Franz, BigOWLIM from Ontotext, and Virtuoso from > OpenLink). These are kinda the big 3 in terms of addressing the > reasoning, large scalability, and performance issues.... > > If you don't really need the built-in reasoning or have huge needs in > scalability/performance , I'd really recommend having a look at > TinkerPop. > For RDF capabilities, you'll probably need to use the TinkerPop Sail > implementation ( check out this blog post => > http://architects.dzone.com/articles/visualizing-rdf-schema ) . > TinkerPop has a pretty good community around it and Neo4j has an > excellent community. The setup is fairly easy, although the Sail stuff > does have a learning curve. Performance seems very good, and using > TinkerPop/Neo4j is great because it offers a variety of querying > options. That all said, I've found performance for triple stores can > be really hard to measure, since how you store your data and how > you're querying can make all the difference...so often it's not the > software, but the way the data model has been designed.. > > good luck! > b,chris. > > > > > > > > On Tue, May 29, 2012 at 10:01 AM, Stefano Bargioni <bargi...@pusc.it> wrote: >> Maybe a G search can help to find comparisons: >> http://www.google.com/search?sugexp=chrome,mod=4&sourceid=chrome&ie=UTF-8&q=4store+Virtuoso+Jena+SDB++Mulgara >> The result includes your post... added 8 minutes ago. >> Stefano >> >> On 29/mag/2012, at 09.12, Ravi Shankar wrote: >> >>> We (DLSS at Stanford Libraries) are planning to use a triple store for >>> storing and retrieving annotations (in RDF) on digital objects. We are >>> currently looking at open-source triple stores such as 4store, Virtuoso, >>> Jena SDB and Mulgara. Are you currently using a triple store or >>> contemplating on using one? How would you evaluate 'your' triple store >>> along the lines of 1) ease of setup, 2) scalability, 3) query performance, >>> 3) bulk load performance, 4) access api, 5) documentation and 6) community >>> support? >>> >>> Highly appreciate your thoughts, ideas and suggestions. >>> >>> Thanks, >>> Ravi Shankar >>> >> >> >> __________________________________________________ >> Il tuo 5x1000 al Patronato di San Girolamo della Carita' e' un gesto >> semplice ma di grande valore. >> Una tua firma aiutera' i sacerdoti ad essere piu' vicini alle esigenze di >> tutti noi. >> Aiutaci a formare sacerdoti e seminaristi provenienti dai 5 continenti >> indicando nella dichiarazione dei redditi il codice fiscale 97023980580.
