Apache Jena reasoner with python

Reply Tue 17 Nov, 2015 09:17 am
I use apache jena fuseki as server sparqlendpoint interface for execute query sparql on an ontology OWL that is loaded on server apache jena. The queries are executed through python languages.

I have need that the results of query must be the consequence of process the reasoning.

How I do at configure the reasoner with apache jena fuseki?

I use library sparqlwrapper for SPARQL Endpoint interface to Python.

# defines the URI of the endpoint and the query to send
uri = "http://localhost:3030/Hotel/query"
query = ("PREFIX : <http://www.semanticweb.org/ontologies/Hotel.owl#> "
"SELECT ?hotel ?price WHERE {"
" ?hotel a :Hotel. "
" ?hotel :hasPrice ?price }")

# obtain a connection to the endpoint and sends the query
sparql = SPARQLEndpointInterface(uri)
rs,fields = converter(sparql(query))
And this is the define the function sparql:

def __call__(self, statement):
This function sends the query to the SPARQL end-point.

statement: query in string form to send.

resultset: the result-set list in JSON format.

resultset = []
print("SPARQLInterface is executing the query...")
t0 = time()
rs = self._sparql.query()
tf = time()
resultset = rs.convert()
print("Query has been executed successfully!\nTime elapsed: {0:.3f} seconds.".format(tf-t0))
raise Exception("")
return resultset
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