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 <[log in to unmask]> 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.