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Thank you. On 12/19/14, 9:20 AM, "Mixter,Jeff" <[log in to unmask]> wrote: >A triplestore is basically a database backend for RDF triples. The major >benefit is that it allows for SPARQL querying. You could imagine a >triplestore as being the same thing as a relational database that can be >queried with SQL. > >The drawback that I have run into is that unless you have unlimited >hardware, triplestores can run into scaling problems (when you are >looking at hundreds of millions or billions of triples). This is a >problem when you want to search for data. For searching I use a hybrid >Elasticsearch (i.e. Lucene) index for the string literals and the go out >to the triplestore to query for the data. > >If you are looking to use a triplestore it is important to distinguish >between search and query. > >Triplestore are really good for query but not so good for search. The >basic problem with search is that is it mostly string based and this >requires a regular expression query in SPARQL which is expensive from a >hardware perspective. > >There are a few triple stores that use a hybrid model. In particular Jena >Fuseki (http://jena.apache.org/documentation/query/text-query.html) > >Thanks, > >Jeff Mixter >Research Support Specialist >OCLC Research >614-761-5159 >[log in to unmask] > >________________________________________ >From: Code for Libraries <[log in to unmask]> on behalf of Forrest, >Stuart <[log in to unmask]> >Sent: Friday, December 19, 2014 10:00 AM >To: [log in to unmask] >Subject: Re: [CODE4LIB] rdf triplestores > >Hi All > >My question is what do you guys use triplestores for? > >Thanks >Stuart > > >========================================================================== >====== >Stuart Forrest PhD >Library Systems Specialist >Beaufort County Library >843 255 6450 >[log in to unmask] > >http://www.beaufortcountylibrary.org > >For Leisure, For Learning, For Life > > > >-----Original Message----- >From: Code for Libraries [mailto:[log in to unmask]] On Behalf Of >Stefano Bargioni >Sent: Monday, November 11, 2013 8:53 AM >To: [log in to unmask] >Subject: Re: [CODE4LIB] rdf triplestores > >My +1 for Joseki. >sb > >On 11/nov/2013, at 06.12, Eric Lease Morgan wrote: > >> What is your favorite RDF triplestore? >> >> I am able to convert numerous library-related metadata formats into >>RDF/XML. In a minimal way, I can then contribute to the Semantic Web by >>simply putting the resulting files on an HTTP file system. But if I were >>to import my RDF/XML into a triplestore, then I could do a lot more. >>Jena seems like a good option. So does Openlink Virtuoso. >> >> What experience do y'all have with these tools, and do you know how to >>import RDF/XML into them? >> >> -- >> Eric Lease Morgan >>