Owlready2 0.20 has been released!

Owlready is a Python module for ontology-oriented programming. It can load OWL 2.0 ontologies and manipulate them transparently in Python.

This new version fix an important bug in UMLS support.

It also stops considering as functional properties associated with exactly-1 or max-1 restrictions. This was intended to be a feature, but was actually often more annoying that desirable. If needed, you can restore the previous behaviour as follows:

import owlready2.prop

Here are the changes:

  • Add support for undoable destroy_entity()

  • Small database optimizations

  • No longer treat properties associated with exactly-1 or max-1 restriction as functional properties, returning single values instead of a list

  • Bugfixes: - Fix performance bug on UMLS mapping in PyMedTermino

The new version be downloaded from PyPI (Python Package Index): https://pypi.python.org/pypi/Owlready2