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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.

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SparQL: Replace subject URIs

We have graphs containing oa:Annotations with certain properties. Since I am working on a local copy of the server, it would be useful to me to change these URIs to point to localhost. According to ...
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System requirements for and alternatives to loading RDF into Jena Fuseki

I have a large rdf file: size: 470MB number of lines: almost 6 million unique triple subjects: about 650,000 triple amount: about 4,200,000 I want to load this rdf definition into a native rdf ...
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Loading data into fuseki server

I want to load .nt file into fuseki server which is running in my computer through http using jena. I can able to connect fuseki server using RDFConnectionFactory but while loading I am getting ...
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Can't upload big RDF files to a fuseki dataset

I downloaded wordnet ontology and I want to upload its files (RDF files) to fuseki server. I created a dataset successfully, but whenever I try to upload wordnet RDF files It gives me an error on ...
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SPARQL querying not possible

I installed Fuseki on my local Ubuntu. Accessible via http://localhost:3030. Added a dataset "fuwstats" and a named graph "fuwstats" and then I imported some triples (see code below). When I want to ...
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How can I fix “broken-pipe error” while trying to insert data to Fuseki db?

I get this error on the log while trying to insert data to Fuseki db. 10:56:44.573 INFO o.a.h.i.c.SystemDefaultHttpClient - I/O exception (java.net.SocketException) caught when processing request to{...
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Can fuseki be config to use two different type of dataset to created a unioned dataset?

I'm thinking that to create two dataset, one is in memory, which frequently changed, another is tdb, which is read-only, can be created as one dataset, but in the back, which in memory remain in ...
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CORS problem in Angular Application communicating with Fuseki server

I'm making an Angular 7 application for managing SPARQL queries (CRUD) in a nice way. One of the feature of this application is to run the query. Query contains a lot of parameters and one of this ...
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Is there any opportunities to find specific class from exsisting ontology and add equivalent class to it using jena

Im trying to find a specific class from ontology and add equivalent class to it. I have a list of classes where i want to add equivalent class, but im not sure how do find them from ontology and then ...
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35 views

Where is Fuseki server storing triple data?

I have installed Jena Fuseki on my computer and I after I create dataset I see in my file system that it appears under fuseki\run\configuration folder, but I cannot find the triples that I upload to ...
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Is there a way to upload a ttl file to Fuseki programatically?

Hi I have created a java program where I take a ttl file and update the turtle statements. Since I have a web interface that connects to fuseki to query the ttl file, I would like to reupload the ttl ...
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Update two version of owl file in fuseki

I have some trouble about uploading files on fuseki. If I have an owl file (ontov1.owl) and I uploaded it in my_dataset on fuseki. Then I have a new version of the same owl file ( ontov2.owl ) , ...
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How do get data from example owl data using sparql query

This is my example owl : <rdf:type rdf:resource="http://www.w3.org/2000/10/swap/pim/contact#Person"/> <foaf:age rdf:datatype="http://www.w3.org/2001/XMLSchema#string">10</foaf:...
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How to send Ontology file to fuseki using java code?

I have deployed the fuseki in Apache Tomcat and want to send ontology file from java code to fuseki. i use this (http://localhost:8080/fuseki) url to use fuseki. Is that possible to send file in ...
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Jena Fuseki - Create dataset remotely with an assembler file

I am running a Fuseki server and I am able to create new datasets by performing an HTTP POST request on http://localhost:3030/$/datasets?dbType=tdb&dbName=<dataset-name>. I am now trying to ...
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How can I specify paths in Fuseki?

I have a Fuseki server running (fuseki-server --mem /ds) with a dataset at path /ds. So far I can upload new models to that dataset and execute queries on it. When I browse to http://localhost:3030/ds/...
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dotNetRdf issue with Unicode escape sequences / Jena Fuseki inability to load apostrophe in URI

I am developing an web application and I need to support storing RDF data onto my Jena Fuseki server from several data sources (DB dumps / URIs). I have encountered a problem with dotNetRdf. I am ...
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39 views

Fuseki 2 FROM clause

I successfully set up Fuseki 2 and uploaded an owl file with some triples in to a dataset called fuseki_test. I can use http://localhost:3030/fuseki_test/query to successfully run this query: SELECT ...
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SPARQL query using Fuseki server in android

How to use Fuseki endpoint to send a query from an android studio. I got nothing when I run my app. I want to query my own ontology and when I query using Fuseki endpoint in the browser, it works. But ...
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Construct query hangs in Fuseki Jena after executing 6 time

I am using Jena (version 3.10.0) with Fuseki(version 3.10.0) to test some construct queries but it hangs after running 6 queries. Below is my code. I am not sure if it is bug in Jena or I am doing ...
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How to persist auto-generated OWL rules or at least not hold them all in memory at once?

I have a data set with about 9 million triples in it and the owl reasoner enabled. When the first sparql query is sent I get a seemingly endless stream of lines in the log file that look similar this:...
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Apache Fuseki endpoint on Cloud server

I think I am missing something really important. I have a cloud server on Digital Ocean using Ubuntu OS and I have installed fuseki-server and I am able to query my ttl file over the interface using ...
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Ajax delete method giving error - Fuseki server

I am having trouble with update and delete through ajax. I am getting an error in SPARQL Query but the query should be fine. Here is my code: function deletePerson(per){ myQuery= ["DELETE{", "<"+...
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BAD IRI warning when running jena fuseki-server

I run jena fuseki on command promt using command fuseki-server --update. It says running but shows this warning: I was wondering if maybe this is what is causing my endpoint to give me an error. I ...
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206 views

Programmaticaly upload dataset to fuseki

I use the jena fuseki 2 docker image to create a fuseki server. And I want to know if there is a way to upload my dataset to fuseki not from the web interface but programmatically, from SPARQL or ...
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32 views

Fuseki Sparql service not able to refer to external rdf resources

I am not able to refer my sparql query to external rdf resources. I do not get any results. I am using Apache Fuseki. Could there be anything wrong in my settings? Thx. PREFIX dc: <http://purl.org/...
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Fuseki 2 transactions via endpoint

I found this document when searching for the ways to have transactions working in Fuseki 2: http://people.apache.org/~sallen/sparql11-transaction/ It describes special endpoint /transaction. The ...
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Apache-Fuseki get request from javascript

I have been able to create a Knowledge Graph using Apache Jena and obtained a ttl file. I am able to get query results from Apache Fuseki endpoint. Now I would like to create a website with a simple ...
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How to persist jena data transactionally

I use jena along with fuseki as my sparql server, and use python to perform HTTP request on sparql endpoint to insert/update. I need advice on how to make the process "transactionally" (I searched but ...
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How to secure all newly created graphs in Apache Fuseki with SecurityEvaluator?

It is possible to assign SecurityEvaluator to all newly created graphs? I can create a secured model it works OK, but I'd like to apply security to all newly created graphs. The user can create a new ...
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How to disable upload data in fuseki?

I have set up a SPARQL endpoint on a public server with Jena Fuseki and i've uploaded my open data into it. So i want users to be able to directly query the dataset without any authentication and in ...
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116 views

Create a unique id for a whole SPARQL query

I need a unique id (uuid) for a whole query independent of the number of matches. Consider the following Data @prefix ex:<http://www.example.org/> ex:John ex:knows ex:Kathrin. ex:John ex:...
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Low Performance for SPARQL Queries to Fuseki on TDB

I have bulk loaded the wikidata dump using tdbloader2. And now I am trying to make SPARQL queries. A query like this runs very slowly(can not be finished in more than 24 hours), though it works on ...
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Cannot retrieve an instance from the ontology

I inserted a new user profile's instance into my ontology. However, I cannot properly retrieve it with SPARQL SELECT query. This query returns nothing. PREFIX rdf: <http://www.w3.org/1999/02/22-...
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Using fuseki to run sparql queries against large TTL files locally

I would like to run / optimize sparql queries on my local machine against a large (~15GB) .ttl file. Because the file is so large, I am thinking that I should upload the file somewhere like a local ...
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38 views

Get prefixMap from Fuseki

I have java app that works with jena tdb and it works fine. Now i migrated to Fuseki and when i want to get the Prefixes i am getting empty List. Model model = ModelFactory.createDefaultModel(); ...
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45 views

Fuseki blocks after 5 requests

I have app with soap services that works with Jena TDB2 and Fuseki. It works fine but my application blocks after 5th requests to get objects from fuseki. Here is the code QueryExecution q = ...
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Apache Fuseki Javascript query cannot get json result

I am trying to create a nice user interface using Apache Fuseki endpoint. This is my javascript: $(document).ready(function(){ var query = ["prefix ab: <http://learningsparql.com/ns/addressbook#&...
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Matching attribute sets using SPARQL

This question is about finding matching candidate and path using a triple store with SPARQL endpoint (Fuseki 3.8.0). The matching criteria is that the attribute's of a candidate must contain all of ...
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Limit Jena Fuseki's CURL access to localhost only

I'm in the process of finishing an RDF server. The requirements for the project are: 1) Triple Store that can be queried online. 2) Two RDF's that need to be generated on a weekly basis; (based on new ...
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Understanding CONSTRUCT templates

I'm learning SPARQL right now, and I'm having trouble understanding the limits of CONSTRUCT templates. Normally everything works fine, just about the way I'd expect it to. However, my understanding ...
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156 views

PHP EasyRDF : unable to get graph from construct query

I'm trying to get a EasyRdf_Graph object from a query sent via EasyRdf_Sparql_Client::query. EasyRDF doc says: SELECT and ASK queries will return an object of type EasyRdfSparqlResult. ...
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Does above code load entire fuseki dataset into memory or keep it at server side?

When I use this snippet of code, I find it issue a GET query to fuseki server, and after I issue more SPARQL query using this model, no more query issued. So is DatasetFactory load entire fuseki ...
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No data available in table, when I customize the rules of JENA FUSEKI?

No data available in table, when I customize the rules of JENA FUSEKI? movies.ttl is the rdf:type owl:Ontology. And rules.ttl is my custom rule. After deleting the @prefix at the top of rules.ttl, ...
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SPARQL Query results not working on localhost OWL file

I have recently created an ontology using protege and then using Apache Jena Fuseki 3.8.0 to query the results. So the .OWL file is hosted locally using MAMP. The OWL file hosted without any issue. ...
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159 views

how to set Jena Fuseki port when using Fuseki as a Service?

I installed Jena and Fuseki as a service using a ansible role gremid.fuseki. And I'd like to custom listen host and listen port.However, I have no idea. Maybe I should edit $FUSEKI_BASE/config.ttl,...
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233 views

How to create a Jena Triple Store based on an existing OWL file using Jena API, Fuseki and TDB?

I am currently working on a project where there is an initial .owl file that contains the base schema for our ontology. We load this file using the Jena API and perform different manipulations on it, ...
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165 views

Fuseki server doesn't show datasets

I'm new to Tomcat, Fuseki and the Shiro.ini file, so forgive me for asking silly questions. System: MacMini ==> OS.X 10.13 (acts as dev-server) Java ==> 8 Tomcat ==> 9.0.10 Workflow: Via a Plist ...
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How to load an ontology into Fuseki from a remote RDF/XML or OWL file?

I have an ontology in OWL or RDF/XML format, say Dublin Core Terms, for example, but online and not locally. To load it into Fuseki via the Web interface, I use the following query: CLEAR GRAPH <...
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SPARQL SKOS:broaderTransitive

I'm using Fuseki server to update and query my ontology , I need to use SKOS concept to create Hierarchical tag relation , for exemple i Hava this Hierarchical relation A------------>B--------------...