Stack Overflow
Stack Overflow

Questions tagged [stardog]

Questions related the Stardog RDF database.

Stardog is a fast, lightweight, RDF database: it supports ; HTTP and the SNARL protocol for remote access and control; as a data model; and for inference and data analytics. It also has advanced features such as full-text search via integration with and integrity constraints.

There is a mailing list and extensive documentation available online.

Related tags :

97 questions
0
votes
0 answers

Running Stardog on Heroku

I'm doing research about how to run Stardog on Heroku but there is no trace. The most related info is something about running Stardog.js (Stardog.rb, and other languages). This repositories are useful to connect to with an existent Stardog server…
Rafa0809
  • 1,733
  • 21
  • 24
0
votes
0 answers

Stardog not returning expected results upon query involving division

this query is supposed to return the proportion of players in a specific competition that are of a certain team. However when I run it on my stardog db, nothing is returned. Stardog doesn't even indicate there were 0 results or fill in column…
user6713064
  • 27
  • 4
0
votes
1 answer

Stardog DB connection with Java

I'm trying to do something really simple: will connect to the DB, read some records, and display them in a nice interface. So far all I've done is start and stop the server, using the following code: Server aServer = Stardog …
cesAR
  • 606
  • 5
  • 16
0
votes
1 answer

Startdog Federated Query with variable service

my Stardog database contains service descriptions of SPARQL endpoints. I'm now trying to select a specific service and call it in the query, as described in https://www.w3.org/TR/2013/REC-sparql11-federated-query-20130321/#values PREFIX void:…
Fabian
  • 23
  • 1
  • 6
0
votes
2 answers

Injection of Autowired Dependencies Failed - Could not Autowire Field (Spring)

I'm building an application that connects to a Stardog database via the Snarl API alongside Springboot for the front end. The autowired beans for the snarlTemplate are working fine, but any Components I defined are having issues. I've taken out the…
R Jackson
  • 105
  • 3
  • 13
0
votes
1 answer

Could not find the main class: com.complexible.stardog.cli.admin.CLI. Program will exit

I'm trying to install Stardog, but it sends me this error: Exception in thread "main" java.lang.UnsupportedClassVersionError: JVMCFRE003 bad major version; class=com/complexible/stardog/cli/admin/CLI, offset=6 at…
Gilberto Ayala
  • 3
  • 2
0
votes
1 answer

Snarl or HTTP? Which protocol I should use to connect to remote Stardog server

I am new to stardog and I want to insert huge size data (in GB's) into remote Stardog server through java API's. Stardog support connection via snarl and HTTP. Now I am confused about which I should choose. I have two question: What are the pros…
Yogesh Patil
  • 536
  • 5
  • 20
0
votes
3 answers

Stardog custom aggregate function unavailable in Jena

I've created a custom aggregate function in Stardog that calculates the standard deviation. This works great when you post SPARQL queries to the endpoint or via the query panel in the admin console. So far, so good, but we're facing a couple of…
tstorms
  • 4,941
  • 1
  • 25
  • 47
0
votes
0 answers

SPARQL best approach for generating flat data for search

We have a triple store of information such as drugs and I'm unsure how I can extract this information to make it available so that it can be indexed by our search engine Elasticsearch. I had envisaged that I would run a SPARQL query to extract the…
Imran Azad
  • 1,008
  • 2
  • 12
  • 30
0
votes
1 answer

how can ask Stardog to use stemming in its search?

I use Stardog as a semantic graph database. My database contains, for example, "apple" but not "apples", so if I query for "apples", it cannot find anything. One possible way to solve this is to add the stem version of all the labels to the…
Sadegh
  • 80
  • 1
  • 6
0
votes
1 answer

Stardog rule doesn't trigger

I'm having trouble writing a correct Stardog rule. As I haven't found a way to validate the syntax of the rule, I don't now if it's a syntax or a logical error. Eitherway, the rule doesn't seem to be triggered when reasoning is enabled (reasoning=SL…
tstorms
  • 4,941
  • 1
  • 25
  • 47
0
votes
1 answer

Programatically add custom rule in Stardog

I'm able to add custom rules to a named graph in Stardog with the following CLI command: stardog data add db_name -g "http://graph_name"/path/to/rules/test.ttl Is there a possibility to do this via the Java API, for instance with the…
tstorms
  • 4,941
  • 1
  • 25
  • 47
0
votes
1 answer

Maven artifact issue with stardog and sesame dependencies

I have a program, developed in a maven project through Eclipse, that provides an ETL service which ingests data, generates turtle format RDF using the Jena API, and loads it into a triple store which requires data sent to it using the Sesame API. As…
DivDiff
  • 963
  • 2
  • 10
  • 22
0
votes
0 answers

how restore a database to a new machine in Stardog

I am trying to restore a database to a new machine in Stardog 2.1.3, but I get this error: Guice provision errors: 1) Error injecting constructor, java.io.IOException: Unable to create directory /home/**user-on-old-machine**/stardog-2.1.3/TEST …
Amin
  • 111
  • 9
0
votes
1 answer

Any benchmark for evaluating the reasoning performance of a triple store?

Does anyone know of a benchmark to evaluate the reasoning performance of a triple store? I am using Stardog which uses Pellet as its reasoner engine and looking for a benchmark to assess the reasoning performance. If there is no then any suggestion…
Amin
  • 111
  • 9
1 2 3 4 5
6
7