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Questions tagged [allegrograph]

AllegroGraph is a closed source graph database (triple store) created by Franz Inc. that supports semantic web standards like RDF, SPARQL, JSON-LD and SHACL.

AllegroGraph is a graph database (triple store) created by Franz Inc. written in in development since 2006. The latest release is v6.6.0.

It supports standards like , , , and , and integration with and .

The server runs exclusively on and offers a web-based client to manage repositories and issue SPARQL queries.

There are based open-source clients available for , , , , , and .

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Needing RDF sample dataset

Hi everyone Ive been looking for some time now for a big enough semantic dataset to do some testing on an algorithm Im developing. With this I mean an already existing RDF/XML file that I could "easily" upload to AllegroGraph. I have found several…
keponk
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Error while installing AllegroGraph on Arch Linux

I get the following error when running install-agraph for agraph-6.6.0 An unhandled error occurred during initialization: Loading sys:aclissl.so failed with error: /home//agraph-6.6.0/aclissl.so: undefined symbol:…
solyarist
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SPARQL: Number of Statements in each Named Graph

The following query returns the number of statements in a repository: SELECT (COUNT(*) AS ?count) WHERE { ?s ?p ?o } Is there a way to return the number of statements for each Named Graph? This following query does not work, only an…
Neil Graham
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AllegroGraph SPARQL: DELETE from both the Default Graph and Named Graphs

Using AllegroGraph 6.4.6 I am trying to generate a single SPARQL DELETE query w/ respect to quads defined: // Example of dataset used for generation of SPARQL const quads = [ ['<1>','<2>','<3>'], // Graph: DEFAULT …
Neil Graham
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SPARQL: Querying the Default Graph

With the RDF query language SPARQL, I'm trying to find a way to do a boolean query (or any other query) for anything not in a Named Graph. ASK { GRAPH null { ?s ?p ?o } } Can't find really any documentation on searching specifically within an empty…
Neil Graham
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Federated store with repositories on different server with reasoning

I want to create a federated store with reasoning in Allegrograph; i can do that with 2 repositories in the same Allegrograph system but when i try to create a federated store with two repositories located on different server; the method…
j hsn
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Federated store with repositories from different server

I want to create an abstract repository to a federated store in AllegroGraph. I can connect to the repositories stored on different server. But when I try to combine them using federate function, it throws an error that it cannot find the repository…
j hsn
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Will Gruff work with other repos than AllegroGraph?

Seems that Gruff only works with AllegroGraph. I've watched a presentation where it says it can connect to SPARQL endpoints, but with a lot of limitations, and to contact Franz to remove some of these limitations.
Vladimir Alexiev
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Change PREFIX in SPARQL

I created an ontology with different prefixes (rdf:, rdfs:, owl:, example:, car:, bike:, ...). I use them to demarcate different domains and examples. A small extract: car:Software rdf:type demo:CyberObject. car:Hardware rdf:type…
Grapheneer
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How to define semantic reasoning path and area on ontologies based on RDF with pellet reasoner?

I created a complex ontology that represents a product structure. I defined the most rules to describe configuration of the product (if you use Part A1 you can't use Part B1 --> you have to choose Part B2 or Part B3). Now I create a product by…
Grapheneer
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Querying AllegroGraph using dotNetRDF

I've got a AllegroGraph server running and have trouble querying remote datastore, there's very little information on documentation. Here's my lil piece of code: using System; using VDS.RDF; using VDS.RDF.Storage; namespace PoC { class Program { …
Evaldas Buinauskas
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Managing transactions with AllegroGraph's Jena API

I'm uncertain as to the behaviour of the AllegroGraph triple store in regard to transactions. The tutorial talks about using two connections, but does not mention Jena models. If I use Model's begin(), commit(), and abort() methods, do I still need…
David
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Is it possible to query AllegroGraph using roqet?

I am trying to query AllegroGraph 4.0 using roqet to extract data in CSV. Is it possible? In roqet man page it is not clear if it can query a triple store besides rdf files. About AG HTTP…
Alexandre Rademaker
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DotNetRDF & AllegroGraph

I'm working on an application for bulk parsing and uploading to an AllegroGraph triplestore, but have run into a snag. I am able to open and read the graph in question using the below code: AllegroGraphConnector conn = new…
Elipson
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conversion of string into resource or UPI in lisp prolog query

I am trying to run the prolog rules which are implemented in lisp. In the lisp code I am having the following problems: I query the persons from AG knowledgebase, the output is in string format such…
user3356568
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