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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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How to write code in C #, to add new data to the database

Adding triplets to GraphDB SparqlRemoteEndpoint endpoint = new SparqlRemoteEndpoint(new Uri("http://localhost:7200/sparql"), "http://localhost:7200/"); SparqlResultSet results = endpoint.QueryWithResultSet("PREFIX : INSERT…
Denis8388
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Specifies variable bindings

I have a problem understanding simple SPARQL demo with GraphDB: PREFIX rd: PREFIX schem: SELECT * WHERE { BIND(?mybind AS ?id) ?id rd:label ?label. { ?id a…
mr_sol
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GraphDB dots in repository ID?

I noticed that GraphDB, in contrast to RDF4J, does not allow dots in repository IDs. We have versioned repositories containing some taxonomies. The version number is used in repository ID, so for example: taxonomy-0.1.3. While this works fine in…
kidney
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skos broader and narrow inverse not working

I have setup GraphDB SE trial version and trying out inference functionality with OWL2-RL ruleset. I have built a simple SKOS knowledge with a single broader relationship. Some how, when I try to query for narrower relationship am not getting any…
arun s
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Stuck loading large dataset with GraphDB

When I load this DBpedia (2015-10, en, ~1 billion triples ) into GraphDB 9.1.1 the CPU load drops to 0% after around 13M triples and idles henceforth. The process does not terminate until I kill it manually. The machine has enough disc space and…
A. Bigerl
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Ask questions about ontology and graphdb

I am just using Graphdb EE for evaluation. I intend to migrate my bigdata from Cassandra to Graphdb but i read the docs that it can contain 2^40 entity = 2,000B entities. I have few questions regarding it: Is a way to extend to unlimited…
david backa
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Why blank node is not displayed on Resource page as a link?and not displayed on visual graph?

Ontotext GraphDB 9.1.1, Free Edition Centos7 3.10.0-1062.9.1.el7.x86_64 One of my graph that contains blank nodes like this: @prefix : . :John :weight [ :value "5" ; :unit "kg" ] . When I searching John in the…
ilikecola
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How run GraphDB as a Windows Service

I would like to run GaphDB in Windows as a service to hide the log events and makes sure it will start automatically when the server is restarted. What is the best/easy way to start GraphDB as a Service? Tks
Carlo
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uploading large file to GraphDB

I want to upload whole of the Dbpedia data set to the GraphDB. I have installed am using Docker container and have run it successfully. Now the problem is, I am unable to upload the .nt files because the maximum size of the file allowed is 200 MB.…
Khan
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Performing a SHACL valdiation on a GraphDB repository using RDF4J

We are trying to run a full SHACL valdiation on a GraphDB 9.1 (free version) repository (as part of a comparative analysis). For this we try to use RDF4J (3.0.3) as mentioned in the beginning of the…
D. Proksch
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GraphDB - Ingesting from CosmosDB

I've just started using GraphDB and want to check this approach of ingesting documents from a CosmosDB. So what I'm thinking is: Create JSON-LD from the CosmosDB document Convert that JSON-LD to RDF (using some library like…
userMod2
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How do you determine predicate "direction"?

Perhaps this is intuition and comes with experience but this came up while I was designing an OWL ontology; How does one determine what's an object and what's a subject between two entities? To clarify through a specific example: Say that you have…
Milan Velebit
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Can't load some ontologies from URL via GraphDB API

I can load the MonDO ontology into GraphDB Free 9 with the /rest/data/import/upload/{repositoryID}/url method with this body: { "context": "http://purl.obolibrary.org/obo/mondo.owl", "data":…
Mark Miller
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Graphdb.js Node.js - Node Server Authentication with GraphDB

I am aware that GraphDB itself provides several ways of authentication. Let's say I lock access to the GraphDB server and let only users with credentials access it. Let's say I create an authorized user with username and password. I am using Node.js…
GGEv
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Graphdb.js node.js one server.repository connection multiple queries through Rest APIs

I am using nodejs and graphdbjs. My question is can I have one repository active and set two queries (payloads as in this case) that will be run on demand as REST APis. For example const server = new ServerClient(serverConfig); const readTimeout =…
GGEv
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