def linked_data_discovery_for_alignment(self, entity_dbpedia_URI,
entityClasses_labels):
'''
discovery DUL classes alignment suggestions by entity and entity class dereferencing URIs from DBpedia
param:
entity_dbpedia_URI : string, DBpedia URI string
entity class labels: list, list of strings
return a tuple containing suggested dul classes for alignment and all_possible_rdf_types
'''
from oke.oak.DBpediaQuerier import DBpediaQuerier
import urllib
dbpediaQuerier = DBpediaQuerier()
try:
entity_rdf_types = dbpediaQuerier.dbpedia_query_rdftypes(
entity_dbpedia_URI)
except urllib.error.URLError:
print("===urllib.error.URLError")
class_inst_rdftypes = self.type_alignment_by_dereferencing_types(
entityClasses_labels)
all_possible_rdf_types = set()
all_possible_rdf_types.update(entity_rdf_types)
all_possible_rdf_types.update(class_inst_rdftypes)
dulClasses = [
rdftype for rdftype in all_possible_rdf_types
if self.is_dul_class(rdftype)
]
#ontology mapping
#dulClasses = self.wikipedia_d0_ontology_mapping(dulClasses)
return (dulClasses, all_possible_rdf_types)
def linked_data_discovery_for_alignment(self, entity_dbpedia_URI, entityClasses_labels):
'''
discovery DUL classes alignment suggestions by entity and entity class dereferencing URIs from DBpedia
param:
entity_dbpedia_URI : string, DBpedia URI string
entity class labels: list, list of strings
return a tuple containing suggested dul classes for alignment and all_possible_rdf_types
'''
from oke.oak.DBpediaQuerier import DBpediaQuerier
import urllib
dbpediaQuerier = DBpediaQuerier()
try:
entity_rdf_types = dbpediaQuerier.dbpedia_query_rdftypes(entity_dbpedia_URI)
except urllib.error.URLError:
print("===urllib.error.URLError")
class_inst_rdftypes = self.type_alignment_by_dereferencing_types(entityClasses_labels)
all_possible_rdf_types=set()
all_possible_rdf_types.update(entity_rdf_types)
all_possible_rdf_types.update(class_inst_rdftypes)
dulClasses=[rdftype for rdftype in all_possible_rdf_types if self.is_dul_class(rdftype)]
#ontology mapping
#dulClasses = self.wikipedia_d0_ontology_mapping(dulClasses)
return (dulClasses,all_possible_rdf_types)
def type_alignment_by_dereferencing_type(self,
entity_class_dereferencing_uri=""
):
'''
Linked Data Discovery for alignment by dereferencing type URI
params: a list of raw entity class expression in context
Query DUL classes by autogenerated deferencing URIs of entity class expressions
return a list of dbpedia type URI
For example:
select distinct ?type where { {?instance dbpedia-owl:type <http://dbpedia.org/resource/Holding_company> .
?instance a ?type .
}
UNION
{
<http://dbpedia.org/resource/Holding_company> dbpedia-owl:wikiPageRedirects ?entity .
?instance dbpedia-owl:type ?entity .
?instance a ?type .
}
UNION
{
<http://dbpedia.org/resource/Holding_company> a ?type .
}
FILTER(?type != owl:Thing)
}
Example output:{'http://dbpedia.org/class/yago/Organization108008335',
'http://dbpedia.org/class/yago/Company108058098',
'http://www.ontologydesignpatterns.org/ont/dul/DUL.owl#SocialPerson',
'http://www.ontologydesignpatterns.org/ont/dul/DUL.owl#Agent',
'http://dbpedia.org/ontology/Company', ...}
'''
from oke.oak.DBpediaQuerier import DBpediaQuerier
dbpediaQuerier = DBpediaQuerier()
query = "select distinct ?type where { "
query += " {?instance dbpedia-owl:type <%s> ." % entity_class_dereferencing_uri
query += " ?instance a ?type ."
query += " } "
query += " UNION "
query += " { <%s> dbpedia-owl:wikiPageRedirects ?entity .?instance dbpedia-owl:type ?entity ." % entity_class_dereferencing_uri
query += " ?instance dbpedia-owl:type ?entity ."
query += " ?instance a ?type . }"
query += " UNION "
query += " { <%s> a ?type. }" % entity_class_dereferencing_uri
query += " FILTER(?type != owl:Thing) "
query += " } "
results = dbpediaQuerier.dbpedia_query(query)
alignment_suggestions = set()
for results in results["results"]["bindings"]:
alignment_suggestions.add(results['type']['value'])
return alignment_suggestions
def type_alignment_by_dereferencing_type(self, entity_class_dereferencing_uri=""):
'''
Linked Data Discovery for alignment by dereferencing type URI
params: a list of raw entity class expression in context
Query DUL classes by autogenerated deferencing URIs of entity class expressions
return a list of dbpedia type URI
For example:
select distinct ?type where { {?instance dbpedia-owl:type <http://dbpedia.org/resource/Holding_company> .
?instance a ?type .
}
UNION
{
<http://dbpedia.org/resource/Holding_company> dbpedia-owl:wikiPageRedirects ?entity .
?instance dbpedia-owl:type ?entity .
?instance a ?type .
}
UNION
{
<http://dbpedia.org/resource/Holding_company> a ?type .
}
FILTER(?type != owl:Thing)
}
Example output:{'http://dbpedia.org/class/yago/Organization108008335',
'http://dbpedia.org/class/yago/Company108058098',
'http://www.ontologydesignpatterns.org/ont/dul/DUL.owl#SocialPerson',
'http://www.ontologydesignpatterns.org/ont/dul/DUL.owl#Agent',
'http://dbpedia.org/ontology/Company', ...}
'''
from oke.oak.DBpediaQuerier import DBpediaQuerier
dbpediaQuerier=DBpediaQuerier()
query="select distinct ?type where { "
query+=" {?instance dbpedia-owl:type <%s> ." %entity_class_dereferencing_uri
query+=" ?instance a ?type ."
query+=" } "
query+=" UNION "
query+=" { <%s> dbpedia-owl:wikiPageRedirects ?entity .?instance dbpedia-owl:type ?entity ." %entity_class_dereferencing_uri
query+=" ?instance dbpedia-owl:type ?entity ."
query+=" ?instance a ?type . }"
query+=" UNION "
query+=" { <%s> a ?type. }" %entity_class_dereferencing_uri
query+=" FILTER(?type != owl:Thing) "
query+=" } "
results = dbpediaQuerier.dbpedia_query(query)
alignment_suggestions=set()
for results in results["results"]["bindings"]:
alignment_suggestions.add(results['type']['value'])
return alignment_suggestions
def entity_rdftypes_feature_extraction(self, entity_dbpedia_URI):
'''
Extracting entity RDF type as feature from DBpedia
return set : entity rdf type set
'''
import SPARQLWrapper
from oke.oak.DBpediaQuerier import DBpediaQuerier
dbpediaQuerier = DBpediaQuerier()
try:
entity_rdftypes = dbpediaQuerier.dbpedia_query_rdftypes(entity_dbpedia_URI,endpoint="http://galaxy.dcs.shef.ac.uk:8893/sparql")
except SPARQLWrapper.SPARQLExceptions.EndPointInternalError:
print("EndPointInternalError: try default dbpedia endpoint next...")
entity_rdftypes.update(dbpediaQuerier.dbpedia_query_rdftypes(entity_dbpedia_URI))
#print("entity_rdftypes:",entity_rdftypes)
return entity_rdftypes
def entity_rdftypes_feature_extraction(self, entity_dbpedia_URI):
'''
Extracting entity RDF type as feature from DBpedia
return set : entity rdf type set
'''
import SPARQLWrapper
from oke.oak.DBpediaQuerier import DBpediaQuerier
dbpediaQuerier = DBpediaQuerier()
try:
entity_rdftypes = dbpediaQuerier.dbpedia_query_rdftypes(
entity_dbpedia_URI,
endpoint="http://galaxy.dcs.shef.ac.uk:8893/sparql")
except SPARQLWrapper.SPARQLExceptions.EndPointInternalError:
print(
"EndPointInternalError: try default dbpedia endpoint next...")
entity_rdftypes.update(
dbpediaQuerier.dbpedia_query_rdftypes(entity_dbpedia_URI))
#print("entity_rdftypes:",entity_rdftypes)
return entity_rdftypes
