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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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Error parsing a RDF XML file with rdflib in Python

I am trying to parse this RDF: …
Yuri Malheiros
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how to remove tuples with similar content by different orders in SPARQL

I have a query returning a couple of variable, ?a and ?b. The problem is that the results contain, for instance, 10, 15, and 15, 10. I need only one of these. How can I check if the tuple already exists? My query is messy but looks like…
msc87
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Difficulty reading a matrix as a node in rdflib

I created an RDF file where images are stored in nodes as matrices. However when I try to read them I cannot get the matrix form: For example from rflib import Literal mm = np.random.normal(0,1,(3,3)) L = Literal(mm) it is very easy to get the…
Alon Ben-Ari
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Retrieving distinct values with rdflib

The following python code is part of a larger piece (everything else is working fine): import rdflib g1 = rdflib.Graph() g1.parse("existing_graph.nt", format="nt") q = "select ?ent_a ?ent_b where { ?ent_a ?c . " \ …
GalB1t
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performing sparql query on the rdf data stored in relational database

I have stored large amount of RDF data into a relational database with the help of rdflib_sqlalchemy.SQLAlchemy.Now I want to execute Sparql query over the same.I can not find any thing to know how to implement sparql query here. Can anyone help.
Niharika Roy
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SPARQL query parsing trouble in rdflib

I am trying to write SPARQL queries using rdflib in python and here below is my code. I want the queries just to return the values of the class or the entities without the URI or the namespace. I don't want to parse the results using regex. I am…
suv_12
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how to unpack dmoz urls from rdf dump with python and rdflib?

i tried to open rdf file (dmoz rdf dump), but a get this error message Traceback (most recent call last): File "/media/_dev_/ODP_RDF_get_links.py", line 4, in result = g.parse("data/content.rdf") File…
user2307154
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How to solve SPARQL warning?

I am trying to retrieve the name of inkers of Comic books. I am trying to build an ontology. Inkers has dbpprop and I have imported rdlib and sparqlWrapper whilst I am having following error. Is there any one who understand this problem? …
Sandesh Rana
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How can I convert SPARQL query into JSON format?

This is my code #!/usr/bin/python # -*- coding: utf-8 -*- import requests from requests.auth import HTTPBasicAuth from abc import ABCMeta, abstractmethod class PPTSparqlClient: """Minimal Class to access PPT SparqlEndpoints""" def…
Kushal Shah
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Error tolerant RDF parsing using RDFlib in python

I am writing a code, that gathers some statistics about ontologies. as input I have a folder with files some are RDF/XML, some are turtle or nt. My problem is, that when I try to parse a file using wrong format, next time even if I parse it with…
Andrejs
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RDFlib with Fuseki running queries very slowly on local server

I have a small wsgi app, running a local Cherry server, and I use the RDFlib to turn human language queries into SPARQL queries for querying a ttl file loaded to fuseki. It works, but it is incredibly slow! The previous version of this script…
user3241376
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RDFlib namespace or prefix parsing error

I have a problem when I get the results of a SPARQL query executed on a simple turtle model. In the model on which the query is executed, I have a prefix which is called "ex1" and another prefix "op" which comes from an imported ontology. However,…
Dragos Popescu
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Extraction of datatype and label names from rdflib.term.Literal

I am executing sparql query through python rdflib like r=sparql.prepareQuery('SELECT ?label WHERE { <%s> rdfs:label ?label . }'%i) My aim is to get the labels for the concepts in this way. As a result I get something like…
ankita singh
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Using IPython Notebook (with rdflib?) to log SPARQL queries and results

I want to use IPython Notebook to record SPARQL queries together with the results of those queries. Since any command-line tool can be called from IPython Notebook with a "bang", I can of course run: !arq --data dcterms.ttl --query test1.rq or with…
Tom Baker
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Trouble with rdfstore with mysql - how to debug?

I have a mysql server running and can connect to it from my Django ORM. Can't connect using the rdflib functionality. How can I debug this problem? Thanks. rdflib 2.4.2, python 2.6, MySQL Community 5.1.42 Trace: configString =…
user265775
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