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Questions tagged [rdflib]

RDFLib is a Python library for working with RDF. It supports parsers and serializers for different syntaxes (RDF/XML, N3, N-Triples, Turtle, TriX and RDFa) as well of remote and local SPARQL queries. Please do not use this tag for rdflib.js.

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Please do not confuse the RDFLib Python library with the rdflib.js Javascript library.

439 questions
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Will RDFLIB Python supports Geosparql queries?

I am trying to execute Geosparql Queries using RDFLIB Python...But I am getting empty results....Is RDFLIB Python supports Geosparql queries ? Please suggest me regarding this. Below is my code to store tripples and query for execution. from rdflib…
Manoj Deshpande
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Is rdflib's ConjunctiveGraph with IOMemory store thread-safe?

I am pulling multiple datasets from multiple sources and want to parallelize that using the threading library in Python 3.8.2. All datasets end in different contexts in a ConjunctiveGraph, which uses an IOMemory store. I saw that a ConcurrentStore…
Torsten Knodt
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Is there a way to iteratively add a list to a graph in rdflib?

I have lists of literals that I would like to add as rdf:lists to a graph. I can read rdf:lists without issue using rdflib.collection.Collection, but I haven't been able to add those lists to other graphs, or iteratively generate an rdf:list from a…
Alex
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Is there a way to quickly access all annotations and sub-annotations from an OWL (RDF/XML) file?

So I have an ontology I've built in Protege which has annotations and sub-annotations. What I mean by that is that a concept might have a definition and that definition might have a comment. So you might have something like…
user3684314
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Unable to parse .nt file with rdflib

My my_data.nt file looks like this: "Robert" . . I am using this code to parse it: from rdflib import Graph g = Graph() g.parse("my_data.nt", format="nt") for ele in g: print(ele) I am getting this…
Akavall
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SPARQL Join ttl to dbpedia in Python

So I know that in order to run SPARQL statements against a local ttl file I use rdflib. In order to run SPARQL statements against dbpedia I run Sparqlwrapper. But how do I do both? i.e. suppose I have a local ttl file and I want to leverage some…
Dano13
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How to use SPARQL to query a ttl file?

I am trying to learn SPARQL and to do that I need to execute queries against a local ttl file. I have researched this and every response says to use rdflib and then run a query against that. Here is the example ttl file I am using # filename:…
Dano13
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What is the benefit of defining datatypes for literals in an RDF graph?

I am using rdflib in Python to build my first rdf graph. However, I do not understand the explicit purpose of defining Literal datatypes. I have scraped over the documentation and did my due diligence with google and the stackoverflow search, but I…
K. Mapleton
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how to load Alignment format in python?

Is there a way to load alignment file to python. If I have file like this:
user52028778
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SPARQL query returns more rows than expected

I'm trying to convert the following Turtle RDF into csv. I just want to keep the values of hasPlaceName, hasICAOcode and hasWKT for each object: :Place_Oberschleissheim_Airport a :Civil_Aerodrome ; :hasPlaceName "OBERSCHLEISSHEIM" ; …
Spyros Ligouras
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MemoryError: Cannot allocate memory -- BDB2034 unable to allocate memory for mutex; resize mutex region

I've created a database based on turtle file (of size ~4.5Gb) using rdflib and started querying it using SPARQL, everything was working smoothly, but after a while I start getting this error: MemoryError: (12, 'Cannot allocate memory -- BDB2034…
Bilal
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visualize n-triple file python

Is there a module or tool in Python that will help me visualize RDF data? I have a N-Triple file and want to load it in python and display the information in it visually. I am currently using RDFLib but it does not have a visualize function. Thank…
Resu
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How to store RDF data to a triplestore in Fuseki SPARQL endpoint using RDFlib in python

New Question: I firstly start the Fuseki Server to create a new dataset called 'address_act': fuseki-server --update --mem /address_act here are the code to get data of each address and then add it to a Triplestore (database) in Fuseki…
SpongeBob
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get the intersected classes in SPARQL query using RDFLib

I have a class ABC that is a subClassOf the class XYZ and defined as intersections of classes A, B, C as: …
Salman
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SPARQL: unable to use FactForge endpoint

I am using python to run some sparql queries. I want to extract information from http://factforge.net/sparql sparql = SPARQLWrapper("http://factforge.net/sparql") query = """ # F02: Big Cities in Eastern Europe PREFIX onto:…
emax
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