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Questions tagged [4store]

4store is a database storage and query engine that holds RDF data.

4store is a database storage and query engine that holds RDF data. It has been used by Garlik as their primary RDF platform for three years, and has proved itself to be robust and secure.

4store's main strengths are its performance, scalability and stability. It does not provide many features over and above RDF storage and SPARQL queries, but if your are looking for a scalable, secure, fast and efficient RDF store, then 4store should be on your shortlist.

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19 questions
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Import Freebase to Triplestore

I'm currently planning a big project containing big data. I already used the search and all results tell me that it's not possible to import Freebase into any triplestore without usage of 3rd Party Tools like BaseKB or Freebase to RDF As I can see,…
smith64fx
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How to store RDF graphs within a data storage?

I want to write a web app with rails what uses RDF to represent linked data. But I really don't know what might be the best approach to store RDF graphs within a database for persistent storage. Also I want to use something like paper_trail to…
sn3ek
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adding triples in 4store

here url_add is a link that contains the rdf triples that i want to store in 4store.but if i pass url_add as an argument it generates Relative URIerror . so what is the way in which i can pass url_add as an argument only. response =…
Amita Singh
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What is the persistent model of garlik 4store

I need to know how 4store make the persistence of it's triples in the database, if it's like a table of 3 columns, one for each element in the triple or if it's another way
Guilherme
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SPARQL 1.1 support in 4store?

I am using BIND ( ) to select and Insert triples, from and to 4store. The following SELECT works, PREFIX Sensor: SELECT * WHERE { ?subject100 Sensor:test1 "100" BIND("1000" as ?x) . } LIMIT 10 But when I…
Nikhil
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Weird SPARQL pattern matching in 4store?

Suppose I have a RDF-base containing 4 triples: "John" "loves" "sushi" "John" "loves" "Mary" "Frank" "hates" "sushi" "John" "hates" "olives" and let's say I consider "sushi" such a weird thing that I'd like to know what exactly people can do…
Anton Zherzdev
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4Store time zone filter not accurate

I'm having issues filtering records between two time filters that include time zones in 4Store. My records are currently mostly in the +02:00 time zone, and it is a xsd:dateTime type. When I try a filter like this: FILTER (?time >=…
Aleksandar Stojadinovic
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transferring rdf to 4store

actually I have a code named rdf.py that generates rdf code ..what I want to do is to directly move that file in 4store.. I have stored the entire code in a variable and want to directly…
Amita Singh
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SPARQL DELETE in 4store

I'm trying to delete a few triples from my triple store but, unfortunately, I can't even get this simple query to work: WITH DELETE { ?s ?p ?o . } WHERE { ?s . ?s ?p ?o . } I just want to delete all triples that…
user2743104
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Issue with INSERT WHERE SPARQL + 4Store

I am trying to insert values using INSERT WHERE. I am using 4Store as the semantic repository. The query is as follows, INSERT { rdf:type . ?URI1257846444363706…
Nikhil
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Storing different graphs created by RDFlib that uses the same Bnodes

I created different graphs using RDFLib in python which share the same Bnodes. Each BNode has a specific name. I am trying now to store all the graphs in one graph using 4store and http4store. The problem I am facing is that after adding a graph to…
TJR
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sparql insert with where clause

How to insert insert query with "where" condition in 4store sparql As far as I have searched I got to know that we have to use curl command for the same.I tried using this Process p = Runtime.getRuntime().exec(new String[]{"bash","-c","curl…
henry mathew
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setting soft limit for 4store client

While running the sparql queries I get the warning # hit complexity limit 20 times, increasing soft limit may give more results and this is not dependent to any particular query but for all.I wanted to know how can I increase the soft limit if…
aditi rana
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importing rdf in 4store

I am trying to add triples in triplestore 4store with 4s-import demo new1.rdf but I am getting this error 4store[20652]: 4s-client.c:129 kb=demo getaddrinfo failed for “fe80::227c:8fff:fe32:518d%wlan0” with error: Address family for…
aditi rana
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Connect Client to 4store (Protégé/Gephi/etc.)

What is the right configuration to connect a RDF/SPARQL client like Protégé (protege.stanford.edu) or Gephi (http://gephi.github.io/, Semantic Web Import Plugin) with the tripplestore "4store"? (http://4store.org/trac/wiki/SparqlServer)? Error in…
Ironori
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