UnicodeDecodeError when trying to load default world

[sparrowhank]

Hello, Im consistently getting the following error while trying to load a antology from a sqlite file created by owlready2:

Traceback (most recent call last):
  File "C:\Users\Jpint\PycharmProjects\Ontologialivros\venv\lib\site-packages\owlready2\driver.py", line 149, in parse
    line = f.readline().decode("utf8")
UnicodeDecodeError: 'utf-8' codec can't decode byte 0x80 in position 16: invalid start byte

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "C:/Users/Jpint/PycharmProjects/Ontologialivros/main.py", line 14, in <module>
    onto = default_world.get_ontology("OntoFile.sqlite3").load()
  File "C:\Users\Jpint\PycharmProjects\Ontologialivros\venv\lib\site-packages\owlready2\namespace.py", line 1044, in load
    try:     new_base_iri = self.graph.parse(fileobj, default_base = self._base_iri, **args)
  File "C:\Users\Jpint\PycharmProjects\Ontologialivros\venv\lib\site-packages\owlready2\driver.py", line 190, in parse
    raise OwlReadyOntologyParsingError("NTriples parsing error (or unrecognized file format) in %s." % getattr(f, "name", getattr(f, "url", "???"))) from e
owlready2.base.OwlReadyOntologyParsingError: NTriples parsing error (or unrecognized file format) in OntoFile.sqlite3.

Process finished with exit code 1

I get this error in any ontology saved, even one created by owlready, this error comes from:

from owlready2 import *
#
# onto = get_ontology("http://test.org/onto.owl")
#
# class Book(Thing):
#     namespace = onto
#
#
# default_world.set_backend(filename = "OntoFile.sqlite3")
#
# default_world.save()

onto = default_world.get_ontology("OntoFile.sqlite3").load()

print(onto.Book.iri)

Im kinda lost what I could possibly be doing wrong ? Thank you very much in advance.

[Jiba]

Hello,

Sqlite3 files created by Owlready are NOT ontology files, but quadstore files (possibly containing several ontologies).

To load an Sqlite3 file, you should use set_backend(), either on default_world, or on a newly created World, e.g. :

default_world.set_backend(filename = "OntoFile.sqlite3")

onto = default_world.get_ontology("http://test.org/onto.owl").load()
print(onto.Book)

Jiba

[sparrowhank]

Hello,

I got it working didnt realize that was the case.

thank you very much for your help.