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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.

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Convert String Variable to URI using SPARQL

Using a string as an URI works using: SELECT DISTINCT ?db_uri ?uri ?db_uri_var ?prop ?val { BIND(URI("http://dbpedia.org/resource/Delta_Air_Lines") as ?db_uri) SERVICE { ?db_uri ?prop ?val . } } However, as…
Oliver
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how to Query to specific graph to RDF database

Hi i have a rdf database and a graph called as urn:graph:2d6d3d07-20b0-4050-ada8-43e5655c919a and i want to query following construct statement to this graph how can i do that? # Expand From IRIs CONSTRUCT {?iri ?predicate ?object .?object a…
x jd
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How to get whole tag text from RDF database?

I have an RDF database and I want to get whole tag text I mean whole text which is inside the tag -
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How to download json code with the help of query in rdf database?

I have a RDF database in my stardog server locally and in which I have one graph now I want to download data of selected stardog:044585392... in JSON or any type of file like RDF/XML with the help of the query see the image for more detail so how…
j4520
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Optional Sparql-Statement for unbound variable is not working in Stardog

Context Hi! I have a specification that displays questions associated with certain relationships in another specification. All objects in my specification have so-called fragment-verbalizations (relation:hasFragmentVerbalisation). To display my…
AnnemarieWittig
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Create db and load files (npm stardog)

We Have an issue to create a new db (npm stardog). we try to load files into the db, but we get an empty db without a file, we think the problem is in -> option.({files: {filename:string}[]}) so We add our code to show how we try to load the…
check everytime
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Does GraphDB provide any mechanism similar to Stardog Integrity Constraint Validation (ICV)

I'm looking for a large triple store database management system that provides a mechanism to guarantee that the commited transactions do not alter the ABox of an ontology in a way that it becomes inconsistent with its TBox. So far the only one that…
Elton
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How to extract data from DBpedia using SPARQL

I'm trying to extract some data from dbpedia using SERVICE function of SPARQL. In fact I want to extract the names, the lat and lot of all New York theaters. To check if an instance is a theater I can use…
Claps
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How to install properly Stardog on Mac OS High Sierra

I downloaded and unzipped Stardog and I get the instructions on the site but I'm unable to run it and need to understand what I'm missing: What I did: export STARDOG_HOME=/data/stardog I downloaded also the key Then: cp stardog-license-key.bin…
Jakub
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SPARQL Querying Data Linked Between Two Separate Graphs

I have a graph of Persons stored in a StarDog instance, and a graph of Addresses in a Fuseki instance. One of the Person instances has a hasAddress relationship with an Address. I wish to make a SPARQL query that simply returns all the Persons who…
Makcheese
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GeoSPARQL within query

I'm struggling with the GeoSPARQL functions. I have two points defined in my ontology. Using this query I get them in my results: PREFIX geo: PREFIX geof:…
Johan Kumps
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Stemming without free-text search in stardog

I am using stardog as semantic database. Query: except all kinds of Mango & vegetable. Expected output: except all kind of Mangoes & vegetables. Actual output: 0 results. I have tried English Analyzer library for stemming. But as per my…
Pratiksha
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Stardog: Location of stardog.properties file

This must be a stupid question, because no one else has posted it and the explanation in stardog is very simple. It says 'Stardog Server’s behavior can also be configured via a stardog.properties—which is a Java Properties file—file in…
Kris
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How to find a path between two resources?

Let's say I have a graph like this: :a :isConnectedTo :b :b :isConnectedTo :c :c :isConnectedTo :d If I run the following query in my Stardog v4.1.3, it returns true ask {:a :isConnectedTo* :d} This is great but I would like to know the path…
Bob Dudan
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SPARQL Query to find results which do not meet a certain criteria

I am trying to write a SPARQL query which will return a set of patient identifier codes (?Crid) which have associated with them a specific diagnosis code (?ICD9) and DO NOT have associated with them a specific medication AND which have an order date…
hayfreed
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