Questions tagged [graphdb]

Ontotext GraphDB is a semantic triplestore: a database for RDF and OWL data. Use this tag for questions specifically about the Ontotext GraphDB product. For questions that are about graph databases in general (or about other graph database products), use the [graph-databases] tag instead.

In essence, GraphDB™ is a “semantic repository” using ontologies that allow the repository to automatically reason about the data. It works with a flexible and generic physical graph data model allowing for easy interpretation and adoption of new ontologies or metadata on-the-fly. GraphDB™ is packaged as a storage and inference layer (SAIL) for Sesame. Sesame is one of the most popular semantic repositories that supports RDF(S) and all the major syntaxes and query languages related to it. GraphDB is fully SPARQL 1.1 compliant. You can read more about GraphDB™ here. The full documentation can be found here.


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GraphDB undirected graph path search

GraphDB 9.9 introduced the powerful feature for retrieving paths (shortests paths, cycles etc.) However, from the documentation it is not clear whether this can also be used for nondirected graphs - i.e. ignoring the edge directions given by…
Rob
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GraphDB behaves inconsistent when a statement with symmetricProperty is deleted

I configured a repository in graphDB with the ruleset OWL2-RL, such that I get the most powerful reasoning capability that graphDB supports in order to check how graphDB behaves when SPARQL updates affect implicit statements. My first experiment…
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RDF4J Ontotext GraphDB: prepareUpdate big Sparql-Update String-> Unsupported MIME type: application/x-www-form-urlencoded

Im trying to send a big Sparql-Update String to GraphDB by using RDF4J. It works for small Sparql-Update Strings, but for a big String (ca. 8000 INSERT DATA-Statements) it fails with the…
Only X
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Does GraphDB Reason over Namespaced Terms?

If I define terms in my RDF namespace, for example dcterms, will GraphDB resolve the ontology and perform reasoning over it? By 'resolve' the ontology I mean fetch the OWL representation at the URI and take the rules into consideration. I understand…
Thomas
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Establishing graphDB elasticsearch connector

I am trying to set up an Elastic search connector in graphDB with the following query: PREFIX : PREFIX inst: INSERT DATA { inst:field…
R Tiffin
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Specify a named graph when inserting tripple using RDF/XML

I am using RDF/XML to insert tripples in a tripplestore (GraphDb). This works but I also need all tripples are gathered into a unique named graph and I am looking for the right syntax in RDF/XML to do this, when inserting data and always using the…
Okilele
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How to run a sparql query from Python over my GraphDB repository?

I'm trying to run a simple query: """ PREFIX rdfs: SELECT ?label WHERE { ?a rdfs:label ?label } """) Over my GraphDB repository, but from Python. After some searching I found that SPARQL wrapper…
Robin
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Property Chains with assertions on intermediate nodes

I have a use case where I'm trying to infer if a specific user has admin access to a resource. I'm using GraphDB. My ontology contains Users, Roles, Permissions and Resources. A User can have N roles. Each Role has different Permissions, one of…
elvaras
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Ontotext GraphDB colors of individuals in Visual Graph

I have been trying to visualize a set of individuals of different types using Ontotext GraphDB. The problem is that all of them are visualized as red circles, since they are all identified as of type owl:namedIndividual, while they also belong to…
Stratos K
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GraphDB: Use RDF-star for edge labels in custom graph?

https://graphdb.ontotext.com/documentation/standard/exploring-data.html#create-your-own-visual-graph describes the ability to create a visual graph using SPARQL queries, and for the "Edge Basics" step it says: Edge basics: This query SELECT the…
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Blank nodes generating when adding object properties to the ontology

I have an ontology in Protege. When I add an object property like X worksFor Y, and then load the rdf to graphdb, it generates 3 triples with subject = blank node, property = owl:someValuesFrom, owl:onProperty, owl:rdfType, and then it adds a triple…
Ric
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Unexpected behavior in Visual Graph, and when returning triples with SPARQL

How are you? I 'm taking my first steps with GraphDb and I've found a couple of behaviors that I don't quite understand. Let me build the case. I have the following Ontology, which I have loaded into GraphDb. enter image description here Let's only…
Ric
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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 ":hasUpstreamProduktionsnummer". The data contains many…
PhilippGr
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Can GraphDB workbench be used against an existing RDF4J server?

Its not clear whether GraphDB-workbench (https://github.com/Ontotext-AD/graphdb-workbench) can be used against an existing RDF4J install.
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Graph Store protocol support in GraphDB

I'm having troubles with using the Graph Store protocol, as documented in GraphDB's help section (the REST API docs). Specifically, I have two issues: The Graph Store protocol is supposed to support PUT requests (see…
Rob
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