class_docstr: This class implement a wrapper for dbpedia ontology
class_docstr_tok: ["This","class","implement","a","wrapper","for","dbpedia","ontology"]
code: def __init__(self, src="models/dbpedia_2015-04.owl"):
      self.graph = rdflib.Graph()
      self.graph.parse(FileIO.filename(src))
      self.root = "http://www.w3.org/2002/07/owl#Thing"
      self.classes = [
          s for s in self.graph.subjects(RDF.type, OWL.Class)
      ]
      self.o_properties = [
          s for s in self.graph.subjects(RDF.type, OWL.ObjectProperty)
      ]
      self.d_properties = [
          s for s in self.graph.subjects(RDF.type, OWL.DatatypeProperty)
      ]
      self.uri2class = {c.toPython(): c for c in self.classes}
      self.uri2class[self.root] = rdflib.URIRef(self.root)
      self.class_labels = [self.token(c) for c in self.classes]
  
file_path: sematch/sematch/semantic/ontology.py
imports: from rdflib import RDF, RDFS, OWL
  from sematch.utility import FileIO
  import rdflib
label_desc: Use image node_id 1 to create a new DBpedia object  with example: obj = DBpedia(src)