557 questions
0
votes
0
answers
27
views
Query with inferred properties
I'm using rdflib to connect to GraphDB.
When specifying inferred properties such as a reverse properties, I get empty response.
In the case below "schema:children" was defined as the reverse ...
- 1,214
Advice
2
votes
4
replies
49
views
How to dynamically select one of multiple validation shapes for a node based on its data
I am working with SHACL validation in GraphDB 11.2 and need to validate RDF nodes against different constraint sets at runtime.
The key requirement is that the applicable shape is not determined ...
- 1,531
0
votes
0
answers
35
views
How to ensure Visual Graph obeys `pin down all nodes`
I want to explore my graph by using visual graph
I pin down all nodes so that I can move single nodes around to improve visual clarity.
I usually move the nodes I touch to the left of the canvas.
...
- 1,531
Advice
0
votes
1
replies
30
views
GraphDB reasoning with custom Ruleset
I want to use GraphDB's custom rulesets, described here.
I have written my own .pie file with my rules and uploaded it to my repository. Everything works as expected.
My problem is, that I do not want ...
- 61
0
votes
1
answer
58
views
SHACL validation results in stack overflow
I have a SHACL-enabled GraphDB repository with 1.6M triples in it, as well as a small set of SHACL constraints (a 20kb file) imported in the usual way, as a named graph. When importing a new (small) ...
0
votes
0
answers
61
views
Uploading large files to GraphDB cluster
I just installed the enterprise GraphDB version on a Kubernetes cluster, using the official Helm Chart (https://github.com/Ontotext-AD/graphdb-helm/tree/main), setting replicas to 5. Therefore, I now ...
- 11
Best practices
0
votes
0
replies
50
views
Proper Memory Configuration for GraphDB Preload and Runtime with 1TB RDF Datasets
I’m fairly new to GraphDB and large-scale RDF systems, and I would really appreciate some expert advice to understand whether I have configured things correctly or if I’m missing something.
My goal is ...
- 71
1
vote
0
answers
59
views
Cannot infer from property chain axiom in GraphDB
I have a simple example ontology (see below) that I made in Protege. In Protege using HermiT, I can see the inferred predicates based on property chain axioms.
When I import the same ontology to ...
- 11
1
vote
0
answers
34
views
How to select Analyzer for GraphDB Lucene Connector
In GraphDB 10.6 I need to search across English and French words ignoring accents. I am looking for ASCII folding.
I have tried this SPARQL to generate the Lucene connector, but I get 500: Error - ...
-1
votes
1
answer
88
views
How to ensure SHACL sh:minCount is obeyed [closed]
Situation
The issue below is solved, my resulting understanding for my actual issue around shacl validation is stated at the bottom.
The code in the upper part is unchanged and includes a syntax error,...
- 1,531
0
votes
0
answers
76
views
GraphDB search uri takes forever in Firefox
Whenever I search and click on a result URI in the GraphDB workbench the search bar of the browser starts to spiral and it takes about a minute to load the triples. I am using version 10.8.4, but I ...
- 63
1
vote
1
answer
147
views
How does OWL2-RL handle date comparisons?
Is it possible to do "greater than date" that gets inferred by OWL2-RL in GraphDB? For ex: "Alice on date after 2024-02-10".
So for example:
:AliceTravelAfterToday a rdfs:Class ;
...
- 127
2
votes
0
answers
79
views
Order of bind/optional
Using GraphDB, I see the following behavior in an OWL2-RL optimized repo.
Probably I’m doing something wrong... but I fail to see what.
Probably not specific to GraphDB, but generic SPARQL question.
...
- 521
1
vote
2
answers
102
views
Is there any support for importing prefix/namespaces
In graphdb workbench, the setup section for a repository has an option called "namespaces",
which includes a list of prefixes and IRIs, eg.
rdf: http://www.w3.org/1999/02/22-rdf-syntax-ns#...
- 25
0
votes
1
answer
130
views
vector embedding on ontotext similarity plugin
Am new to Ontotext. I understand similarity index of ontotext. It creates vectors of the index data and we can do search upon it. Is there a way to create vectors by other embedding models? Please ...
