Using Ontoenv and Shifty to validate ASHRAE 223 models

Mon, 06 Jul 2026 00:00:00 +0000

My ontoenv and shifty projects are far enough along that I can provide some simple scripts for validating ASHRAE 223 models.

Here’s the simple version of the script that requires you to provide all of the ontologies you want to validate against:

# /// script
# dependencies = [
# "rdflib",
# "pyshifty>=0.2.5"
# ]
# python = ">=3.10"
# ///
import rdflib
import shifty
import sys


print("Loading model file into rdflib graph...")
model_file = sys.argv[1] if len(sys.argv) > 1 else "https://models.open223.info/NIST-IBAL.ttl"
model = rdflib.Graph().parse(model_file)

# If you know the ontologies you want to use for validation,
# you can load the graphs manually
s223 = rdflib.Graph().parse("https://open223.info/223p.ttl")
qudt = rdflib.Graph().parse("http://qudt.org/3.2.1/shacl/qudt-all")
# provide both shape graphs to the validator
conforms, report_graph, results_text = shifty.validate(model, [s223, qudt], minimum_severity="Violation")
print("Validation results:")
print(results_text)
print(f"Conforms: {conforms}")

Here’s the slightly more complex version that uses ontoenv for automatic resolution of the ontology dependencies.

223 on Gabe Fierro

Using Ontoenv and Shifty to validate ASHRAE 223 models