Error parsing a RDF XML file with rdflib in Python

Question

I am trying to parse this RDF:

<?xml version="1.0" encoding="UTF-8"?>
<rdf:RDF xmlns:rdf="http://w3.org/1999/02/22-rdf-syntax-ns#">
    <rdf:Description rdf:about="http://sentic.net/api/en/concept/celebrate_special_occasion/polarity">
        <rdf:type rdf:resource="http://sentic.net/api/concept/polarity"/>
        <polarity xmlns="http://sentic.net" rdf:datatype="http://w3.org/2001/XMLSchema#float">0.551</polarity>
    </rdf:Description>
</rdf:RDF>

I am loading it from the URL: http://sentic.net/api/en/concept/celebrate_special_occasion/polarity

To do this I am using this code:

import rdflib

g = rdflib.Graph()
g.parse("http://sentic.net/api/en/concept/celebrate_special_occasion/polarity", format='xml')

However, the code return this error:

ParserError: http://sentic.net/api/en/concept/celebrate_special_occasion/polarity:4:67: Repeat node-elements inside property elements: http://w3.org/1999/02/22-rdf-syntax-ns#type

Does anyone know what is happening? Which element is repeated? How can I solve this?

score 0 · Answer 1 · answered Sep 03 '15 at 23:18

It doesn't appear to be valid RDF. The W3C validator fails.

I loaded it with [rapper] and got a more descriptive error message.

rapper: Parsing URI http://sentic.net/api/en/concept/celebrate_special_occasion/polarity with parser rdfxml
rapper: Serializing with serializer turtle
rapper: Error - URI http://sentic.net/api/en/concept/celebrate_special_occasion/polarity:5 - property element 'Description' has multiple object node elements, skipping.

Error parsing a RDF XML file with rdflib in Python

1 Answers1