Owlready2 0.21 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 realease fixes several bugs and now includes Pellet 2.3.1 (same version as in Protégé) instead of version 2.4 (which seems to have problems with some SWRL builtins).

Here are the changes:

• Use Pellet 2.3.1 (same version as Protégé) instead of 2.4 (which has a bug in SWRL for many builtin predicates including equals and matches)

• Much faster mangement of annotations on relations

• Bugfixes: - Fix bug on blank node in RDFlib/SPARQL support - Fix bug on blank node deletion in RDFlib/SPARQL support - Fix data loss in Restriction modification - Fix 'no query solution' error in search() - Fix literal support in RDF lists, causing "TypeError: '<' not supported between instances of 'NoneType' and 'int'" when saving ontologies - Fix DifferentFrom SWRL builtin - Fix string parsing in SWRL rules - Fix string and boolean literal representation (str/repr) in SWRL rules - Fix the inverse of subproperties having a symmetric superproperty

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