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Questions tagged [fuseki]

Fuseki is a SPARQL server. It provides REST-style SPARQL HTTP Update, SPARQL Query, and SPARQL Update using the SPARQL protocol over HTTP.

Apache Jena Fuseki is a SPARQL server. It can run as a operating system service, as a Java web application (WAR file), and as a standalone server.

It provides the SPARQL 1.1 protocols for query and update as well as the SPARQL Graph Store protocol.

Fuseki is tightly integrated with TDB to provide a robust, transactional persistent storage layer, and incorporates Jena text query and Jena spatial query. It can be used to provide the protocol engine for other RDF query and storage systems.

423 questions
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Create Fuseki in memory server

There is a parameter --mem in Fuseki: fuseki-server --mem /DatasetPathName Could I use it to load full tdb indices into memory to improve query performance? For example, fuseki-server --mem --loc=/tdbpath /DatasetPathName /tdbpath is a…
GStone
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Jena-Fuseki requires dataset specified

I have Jena-Fuseki server accessed via browser at http://localhost:3030/sparql.html. The query select * where { } results in an error: Error 400: No dataset description in protocol request or in the query string The query select * from…
Alexei Kaigorodov
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How to start Fuseki when OS starts?

Is there an easy method of starting Fuseki when the OS starts, more or less like we can start a Tomcat or ElasticSearch instance from /etc/init.d/tomcat7 start or /etc/init.d/elasticsearch start? As far as I have seen Fuseki doesn't seem to have a…
paxRoman
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Sparql query doesn't upadate when insert some data through java code

I'm trying to insert data through my java code to the owl file which is loaded into Fuseki server. Update query doesn't give any error message. But owl file doesn't update.I'm using jena library and implemented using java code. What is the wrong in…
Maduri
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Reduce string length of query sparql with fuseki

When I start a Fuseki server, I use this command : fuseki-server --config=config-orphadata.ttl In this ttl file, I can writte some prefix rules : @prefix orphanet: . @prefix ORDO:…
Matthieu
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Fuseki 1.0.1 SPARQL Update returns 404

I'm trying to learn to update data in Fuseki, but when I try I get a 404 error. I am clearly not doing something right. Perhaps it is my INSERT command? I've tried a ton of them though. I am using the web based SPARQL interface at /sparql.tpl.…
MeowCode
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Jena/Fuseki : loading a custom implementation of com.hp.hpl.jena.graph.impl.GraphBase?

I wrote an implementation of com.hp.hpl.jena.graph.impl.GraphBase package mygraph; import (...) public class MyGraph extends GraphBase { public MyGraph() { } @Override protected ExtendedIterator…
Pierre
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SPARQL Update (DELETE/INSERT) with WHERE Condition Referencing Multiple Graphs

I'm trying to do a SPARQL update in Jena Fuseki, but I can't seem to get it to work. The following is the issue: I have triples in a graph (named freetest), and those triples need to be changed. And in a separate graph (named knora-base), I have a…
Balduin
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Fuseki 4.4 UI - set endpoint for update queries

With Apache Jena Fuseki 4.3.2 it was possible to set/edit the endpoint on the UI to use update queries. Fuseki 4.4 sets the query endpoint, which cannot be changed resulting in an error message on update queries. How can I set the update endpoint…
airkangoo
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Query on string not working in SPARQL with Fuseki (MAKG dataset)

I would like to make a SPARQL query using MAKG (Microsoft Academic Knowledge Graph) (https://makg.org/) and DBPedia datasets (using SERVICE keyword) on Apache Jena Fuseki. Before that, I want to test some simpler queries for just MAKG such…
furtivesock
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Number of triples in Jena Fuseki

I have to upload 3 billion triples but the maximum would seem to be 1.7 billion https://www.w3.org/wiki/LargeTripleStores#Jena_TDB_.281.7B.29 It's correct? What is the maximum number of triples I can load in fuseki?
Robert Barry
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How to clear the unused space in fuseki

Observed a behaviour associated with fuseki that, even after dropping the graphs from a fuseki dataset (using DROP GRAPH command), the actual size of the folder "run/databases" is not decreasing. Recently read about the backup and restore mechanism…
Bhavya
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What information does Fuseki DB folder contain

Curious to know what kind of data fuseki DB folder contains (apache-jena-fuseki-2.4.0/DB/). Iam using apache jena fuski 2.4.0 version. Even if I try upload and drop of graphs to fuseki datasets or dataset deletion or normal graph updates, no files…
Bhavya
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Not able to create or access datasets in Jena Fuseki docker container

I am using https://github.com/apache/jena/tree/master/jena-fuseki2/jena-fuseki-docker to build a docker image for Apache Jena Fuseki. I followed the exact same steps mentioned but I am not able to see an in-memory dataset when I…
snehankit dongare
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Getting exception while creating Lucene indexer using DotNetRDf.Query.FullText

Hi I am trying to use DotNetRDf.Query.FullText in .Net core 3.1 to create Lucene indexer but getting below run time exception. Can you please help to resolve this issue? System.TypeLoadException HResult=0x80131522 Message=Could not load type…
Deepali
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