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Questions tagged [openlink-virtuoso]

Official site

Technically, Virtuoso is a modern enterprise-grade solution for data access, virtualization, integration and multi-model relational database management (SQL Tables and RDF Graphs).

Conceptually, Virtuoso provides a “Data Junction Box” that drives enterprise and individual agility by deriving a Semantic Web of Linked Data from existing data silos.

Please use the tag instead.

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Sparql UNION returns Virtuoso 37000 Error SP031

I have the query shown below: SELECT DISTINCT ?dataset ?title WHERE { ?dataset a dcat:Dataset ; dcterms:title ?title ; dcterms:description ?description . { ?dataset dcterms:title ?title . ?title bif:contains…
fritten
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sparql rdfs:range returns nothing

I am trying to run a query to get rdfs:range of different predicates. This is my query: PREFIX rdf: PREFIX rdfs: select DISTINCT * FROM …
Nilou
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Openlink Virtuoso upgrade 6.x to 7.x on ubuntu 16.04

I have installed Openlink Virtuoso using the ubuntu packages following the instructions in http://vos.openlinksw.com/owiki/wiki/VOS/VOSUbuntuNotes . I have Ubuntu 16.04, and this process installed virtuoso version 06.01.3127, which is rather…
theo
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Virtuoso Create SPARQL endpoint via ISQL Missing option

I am trying to create an endpoint to access /sparql endpoint using iSQL. My current query is DB.DBA.VHOST_DEFINE ( vhost=>'test', lhost=>':4457', lpath=>'/sparql', ppath=>'/!sparql/', is_dav=>1, is_brws=>0, def_page=>'sparql.vsp', …
Virtuoso
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Java DB Connectivity and virtuoso

During an IoT school project running for some time now I need to store json-ld data to openlink virtuoso triple store using only java and then be able to query them from a sparql endpoint of virtuoso. The data will be coming from sensors(not…
IncogniBit001
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Does Openlink Virtuoso provide a simple read-only SPARQL query page out of the box?

I'm wondering if Virtuoso has any built in features or packages that would let me expose a simple page where people can enter read-only SPARQL queries? (sort of like this: http://dbpedia.org/snorql/) I know if you log into conductor, there is a…
NoCarrier
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Virtuoso appears to be installed... but isn't (and won't run)

I've followed the instructions to install the stable branch of Virtuoso Open Source 7 on Ubuntu 16.04. There don't appear to be any errors throughout the process of — ./autogen.sh CFLAGS="-O2 -m64" export CFLAGS ./configure make make…
user9175828
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E: Unable to locate package virtuoso-vad-cartridges while installing Virtuoso

I am trying to install openlink vituoso Inserting below command in ubuntu 16.04, sudo apt-get install virtuoso-vad-{isparql,ods,cartridges,tutorial} I have following messages: Reading package lists... Done Building dependency tree Reading state…
s.22217330
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Fastest way to load 50Gb of Relational Data into Virtuoso?

I have a relational table with schema (id, numvalue1, numvalue2, name, surname, telephone). The first three columns are integer and the last three columns are nvarchar. Loading 1 million records into Virtuoso now takes around 5-6 hours with batch…
Cheryl
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querying Virtuoso RDF from Pentaho (Kettle)

I'm trying querying a Virtuoso (RDF-store) graph from Pentaho. I do it with pentaho-step "Execute SQL script" (with this pentaho step I do insertions in the same RDF-graph) in this way, I get launch execution but I get a columns of 0's in the…
Sergio
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Running Virtuoso Interactive SQL query via HTTP

I want to know if it is possible to run an isql query via HTTP in OpenLink Virtuoso. I understand that the isql server runs on port 1111, but I cannot find any example (e.g. curl) to run an SQL query (not SPARQL) via HTTP. I don't want to use ODBC…
João Rocha da Silva
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