552 questions
0
votes
1
answer
130
views
Is it possible to remove logs in GraphDB?
I have a GraphDB application with a huge folder size in "./logs".
I notice there are 3 types of file logs: error, main, and query.
I understand We can delete those but I could find any ...
- 11
2
votes
2
answers
553
views
Adding jdbc driver when creating Ontop Virtual repository problem
I'm having problems adding a jdbc driver when creating an Ontop virtual SPARQL repository. I follow the instructions here.
The interface already warns that there is no JDBC driver found in the ...
- 106
1
vote
1
answer
83
views
Is there a SPARQL Query to Trace different Process steps of one Workflow into one row
I use GraphDB to store different production steps. The productionsteps are typified by their steps such as A,B,C,D.
Process steps that belong together are connected by the object property ":...
- 76
0
votes
1
answer
682
views
Upload Turtle files by Post method in Python
I am trying to send a turtle file via a Python script using REST api to the local repository but the System is returning the following error
MALFORMED DATA: Illegal subject value: "-"^^http:...
- 37
0
votes
1
answer
58
views
FROM keyword not retrieving remote triples
The following query works fine with Jena ARQ but in GraphDB it does not retrieve anything:
SELECT *
FROM <http://www.bobdc.com/miscfiles/BeatlesMusicians.ttl>
WHERE { ?s ?p ?o .}
Is there ...
- 51
-1
votes
1
answer
163
views
Ontotext GraphDB on Docker - how to work with file on host file system instead of inside the container
I have Ontotext GraphDb running in a Docker container in Windows Home. I want to create repositories, generate logs and any other operational files in my host file system (Windows), so I can access ...
- 75
0
votes
1
answer
106
views
Java Compatibility -- GraphDB Free Edition -- Standalone Variant
When starting the standalone version via graphdb.cmd the following message is given:
"This GraphDB distribution requires Java 8, 11 or 12 but you have Java 15".
However, the startup is ...
- 1
0
votes
2
answers
11k
views
unable to find valid certification path to requested target (when loading RDF from URL)
I am trying to load some triples from URLs into GraphDB 9.1.1. I have done that in the past without any problem, using the web based Workbench, or via the rest/data/import/upload/<repository>/...
- 3,136
0
votes
1
answer
198
views
Problem to launch GraphDB 9.5 on ubuntu 20.04
I have tried to install GraphDB standalone server(9.4 and 9.5) on Ubuntu 20.04 while unzipping the zip file. Then, I went to graphdb/bin to execute "graphdb". On both version, I got the ...
1
vote
1
answer
750
views
Is there a possibility to batch a select-query with SPARQL and RDF4J?
I am working with a quite large dataset (around 500Mio-Triples) stored in graphDB Free and running on my local developer machine.
I want to do some operations with the dataset with RDF4J and have to ...
- 103
2
votes
1
answer
302
views
Where is the “SPARQL” button in OntoRefine tab of GraphDB 9.5 Free Edition?
I wanted to transform tabular data into linked data. I was trying to use SPARQL construct to achieve this in GraphDB 9.5 Free edition. From the tutorials in GraphDb website it says "You can ...
0
votes
1
answer
165
views
Using Ontorefine to import data from a Postgresql database
I am using GraphDD 9.5 Free and I would like to import data from a Postgresql database (version 13 installed on a Windows 64 bits machine). However, after I add the connection settings, even if it ...
0
votes
1
answer
73
views
manually adding ontology to a repo that originally had no metadata upon import in GraphDB?
Recently some queries like the following started failing:
@prefix myOnto: <ontology url>
select * where {
?sam ?loves ?greenEggs .
?loves rdfs:subPropertyOf myOnto:foodFeals .
}
...
- 1,073
1
vote
1
answer
158
views
imported .owl files have #'s in prefixes vs original rdf4j triplestore
When I import the dump "PathwayCommons12.All.BIOPAX.owl.gz" (linked from this page) of this Virtuoso triplestore, I've noticed that there are "#"s inserted after the prefix of ...
- 1,073
0
votes
1
answer
337
views
How to Update the Input File of an OntoRefine project in GraphDB
I'm trying to script RDF/OWL data (re)loading to a GraphDB store and I wonder how to be able to process again a CSV file through the Ontorefine component, keeping the columns modifications and the RDF ...
0
votes
1
answer
61
views
GraphDB Lucene connector - how to edit
Is there a way to edit existing Lucene Connectors in GraphDB's workbench? The provided buttons are only for rebuilding, copying and dropping a connector.
- 70
1
vote
1
answer
692
views
RDFS-Plus Reasoning for rdfs:domain and range in GraphDB
Consider two GraphDB repositories with different reasoning rulesets:
Repo A with ruleset "RDFS (Optimized)"
Repo B with ruleset "RDFS-Plus (Optimized)"
I executed the following ...
- 503
0
votes
2
answers
97
views
Is there anyway to restore a deleted graphdb repository?
Mistakenly I have deleted a repository from live https://graphdb.sti2.at/ , Is there anyway that I can restore the deleted graphdb repository ? Its important to restore.
- 21
0
votes
1
answer
140
views
Example of differences in "Expressiveness" in graphDB rulesets (RDFS-Plus) vs Protege (Pellet/Hermit)
I am having trouble importing my Protege 5 ontology into graphDB and seeing the inferred classes. This is due to different "expressiveness" in the programs' reasoners' approaches. Can ...
- 23
2
votes
1
answer
214
views
GraphDB - Inferred statements from new empty repository
I'm running some basic tests with GraphDB, and I am surprised to see that when a new repository is created, some statements seems to already be there (inferred by GraphDB).
Here is the summary of the ...
- 172
0
votes
1
answer
98
views
Can I inspect the shape graph
I followed the instructions on https://graphdb.ontotext.com/documentation/9.4/free/shacl-validation.html, and it worked as documented. However, once this is done, I found no way to inspect the Shape ...
- 2,104
2
votes
1
answer
78
views
Similarity plugin with French Language
I'm using the Similarity plugin with org.apache.lucene.analysis.fr.FrenchAnalyzer and I got strange results when searching close terms for a word. Some of the candidate term representations are ...
0
votes
1
answer
349
views
direct answer to sparql select query of equivalent class for graphdb?
I have an "EquivalentTo" definition in Protege of a class EquivClass as (hasObjProp some ClassA) and (has_data_prop exactly 1 rdfs:Literal)
Is there a form of SPARQL query for GraphDB 9.4 to ...
- 31
1
vote
1
answer
202
views
is it possible to 'clone' all repositories on a running GraphDB instance to a new server?
tldr: can I just copy the parent directory with all my repositories to the new machine?
I have a GraphDB (free) server with 8 repositories that I need to move to new hardware. Is there documentation ...
- 1,073
1
vote
2
answers
257
views
graphDB User/PW proxy settings lead to statuscode 407
I'm trying to run following SPARQL-query on my local graphDB-Instance (GraphDB Free 9.4.1 on Windows).
PREFIX wd: <http://www.wikidata.org/entity/>
PREFIX wdt: <http://www.wikidata.org/prop/...
- 103