ONTology editOR (ontor)

ontology editor built on Owlready2

functionality

each instance of the ontor class represents an individual ontology and provides support for:

creating new, loading existing, and saving ontologies
modifying ontologies:
import other ontologies
simply extract information such as axioms and class restrictions
insert classes, properties, instances, relations, and restrictions
delete classes, properties, instances, relations, and restrictions but preserve the ontology's structure by reassigning subclasses and instances appropriately
reasoning over ontologies and debugging by interactively deleting problematic axioms
visualizing the entire ontology or selected parts thereof

ontor provides a tuple based syntax with JSON and CSV support for ontology editing to facilitate focusing on the ontology's content

requirements and installation

Python 3.9.5+
install ontor using pip
regular: pip install .
editable mode: pip install -e .
generate documentation via sphinx using the makefile in docs/: make html

demo

the directory example/ includes a demo application inspired by Protégé's pizza example

interactively debug an ontology
in the example: ontor3.debug_onto()

visualize selected instances, classes, and properties in a given radius around a focus node; e.g., all nodes in a radius of two relations around the node "John"
in the example: ontor3.visualize(classes=["human", "pizza"], properties=["likes", "diameter_in_cm"], focusnode="John", radius=2)