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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.

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How to store Polygon Coordinates as WKT Literal Values using RDFLIB?

I am working on GEOSPARQL queries. And I want to store Polygon Coordinates as wktLiteral values using RDF Graph (RDFLIB python). Currently I am doing that using the below code. GEO = Namespace("http://www.opengis.net/ont/geosparql#") if name ==…
Manoj Deshpande
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rdflib invalid remote context when testing on local sever

I am trying to test different contexts applied to json file. I have created a very simple context file (named mycontext.json) on my local machine (a 2019 MacPro) with the contents: { "name": "http://example.com#name", "age":…
Bill
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Protégé: Différent results between DL Query and SPARQL Query

Here is a small ontology called wildlife.owl, created by Protégé, in which I have classes animal, carnivore, herbivore, lion, giraffe, and individuals Léo (a lion), Gigi (a giraffe) and Giginou (also a giraffe). In the ontology I only declare that…
yannis
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How to relabel nodes in a rdf(.ttl) graph in visual presentation in python?

I want to get a visual presentation of a rdf(.ttl) graph. I am using this code(python): # print the ttl sources as a graph def nt_to_graph(rel_path): g = Graph() g.parse(rel_path, format="ttl") g.bind("food", "http:/food#") G =…
eytaniva
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same python code works different in FLASK and CLI script

I'm running code in a python script and code in a flask api. The problem is to add rdf triples to an rdflib Graph. If i run it in command line script parsed by interpreter it works. If i run the same code in a flask api it ignores some logic. The…
Nja
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rdflib query sparql cause parsing error with FILTER key

I'm trying to run a SPARQL query against a graph with rdflib. It works well if i didn't use FILTER else it cause error on parsing the string to a query. i'm using PYTHON 2.7. Looking at other people query i cannot see any syntax error. Here the…
Nja
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How to write Sparql query for the following result?

[![SPARQL Query Details][2]][2] How should I write SPARQL query to get the details from node2 : URI for node2 is same in both the graphs and URI for node 1 is different. Thank you in advance. as such, I need below details. node2 def hasID…
Manoj Deshpande
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How to properly patch with ModelSerializer?

I'm trying to .save() my data in database. But I get an error {'Hero_id':[ErrorDetail]}. Models.py: class Hero(models.Model): Hero_id = models.IntegerField(auto_created=True,…
Denzel
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Store add_graph appears to do nothing with rdflib and Fuseki

I have a Fuseki endpoint and want to use the python rdflib library to add graphs to it. I connect to the Fuseki server as follows: import rdflib from rdflib import Graph, Literal, URIRef from rdflib.plugins.stores import sparqlstore query_endpoint…
user2302244
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Adding triples from a list to graph using python's rdflib framework

I am trying to add triples to a Graph using python's rdflib package. The relations are provided as a list (a particular column in a dataframe) sampleRelations = ['similarTo', 'brotherOf', 'capitalOf'] g = Graph() # general relations gen =…
Betafish
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how to pattern match triples using rdflib without using SPARQL

I want to pattern match triples of an existing RDF graph. The triples() function of the RDFLib module looks like it could do the job, but I cant get it to work. Can someone provide an example? Consider the following graph. @prefix ex:…
user0221441
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rdb2rdf using rdflib but open() does not work

i am trying to convert relational db to rdf using rdflib , i tried code you can find it in this link https://pypi.org/project/rdb2rdf/ but does not work. i am using SQL server instead of PostgreSQL. after open() , i print length of graph and give me…
alaa seb
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how to search for jobs using semantic search and ontology using python?

i'm building a simple online semantic search engine to find jobs and i found a simple program that reads a local owl file but i want it to be online to fined jobs and employers using the semantic web and linked data from owlready2 import * class…
Mosa Abbas
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Properties of RDF subjects

I have an nt file with three tubles subject, predicate, object Now I want to group for each subject on its predicates. For example if I have Then the output will be s p1, p2, p3 using python rdflib any…
ÚÒíÒ ÇáËÚÇáÈí
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How to append .ttl file in python rdflib

I am working by using rdflib python library for .ttl file processing. I have some triples in the .ttl file but I want to append (update) the file by adding new triples to the existing .ttl file using python rdflib library. For example: file1.ttl…
Shahi Dost
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