How Can I Tell Stardog To Use Inference When Querying It Through Sparqlwrapper?
I have a SPARQL query that returns results in the Stardog query panel when inference is enabled, but not when it's disabled. When I try the query through python with SPARQLwrapper,
Solution 1:
The documentation of Stardog is pretty good:
HTTP
For HTTP, the reasoning flag is specified with the other HTTP request parameters:
$ curl -u admin:admin -X GET "http://localhost:5822/myDB/query?reasoning=true&query=..."
which means simply add the param ?reasoning=true
to the remote URL string.
Solution 2:
I had the exact same problem. The solution is to use addParameter
when you build the query which adds the required reasoning=true to the URL.
A skeleton of a query could then look like this:
from SPARQLWrapper import SPARQLWrapper, JSON
endpoint = '<your endpoint>'
sparql = SPARQLWrapper(endpoint)
# add your username and password if required
sparql.setCredentials('<your username>', '<your password>')
rq = """
<your query string>
"""
sparql.setQuery(rq)
sparql.setReturnFormat(JSON)
# use reasoning
sparql.addParameter('reasoning', 'true')
data_json = sparql.query().convert()
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