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
>>