OWLAPY is a Python Framework that serves as a base structure for creating and manipulating OWL Ontologies.
Have a look at the Documentation.
git clone https://github.com/dice-group/owlapy
conda create -n temp_owlapy python=3.10.13 --no-default-packages && conda activate temp_owlapy && pip3 install -e .or
pip3 install owlapyIn this example we start with a simple atomic class expression and move to some more complex ones and finally render and print the last of them in description logics syntax.
from owlapy.class_expression import OWLClass, OWLObjectIntersectionOf, OWLObjectSomeValuesFrom
from owlapy.owl_property import OWLObjectProperty
from owlapy import owl_expression_to_sparql, owl_expression_to_dl
# Create the male class
male = OWLClass("http://example.com/society#male")
# Create an object property using the iri as a string for 'hasChild' property.
hasChild = OWLObjectProperty("http://example.com/society#hasChild")
# Create an existential restrictions
hasChild_male = OWLObjectSomeValuesFrom(hasChild, male)
# Let's make it more complex by intersecting with another class
teacher = OWLClass("http://example.com/society#teacher")
teacher_that_hasChild_male = OWLObjectIntersectionOf([hasChild_male, teacher])
# You can render and print owl class expressions in description logics syntax (and vice-versa)
print(owl_expression_to_dl(teacher_that_hasChild_male))
# (∃ hasChild.male) ⊓ teacher
print(owl_expression_to_sparql(teacher_that_hasChild_male))
# SELECT DISTINCT ?x WHERE { ?x <http://example.com/society#hasChild> ?s_1 . ?s_1 a <http://example.com/society#male> . ?x a <http://example.com/society#teacher> . } }Every OWL object that can be used to classify individuals, is considered a class expression and inherits from OWLClassExpression class. In the above examples we have introduced 3 types of class expressions:
Like we showed in this example, you can create all kinds of class expressions using the OWL objects in owlapy api.
Currently, we are working on our manuscript describing our framework.