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examples/demos/complex_relational_database_migration_example/complex_relational_database_migration_example.py
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# ruff: noqa: E402
import asyncio
import os
import sqlalchemy as sa
# This example uses a local Postgres migration database and no backend ACL.
# Set os.environ before importing Cognee: Cognee reads env-backed settings at import time, so values
# assigned later may not override defaults or `.env`. See https://docs.cognee.ai/setup-configuration/overview#using-os-environ
os.environ["ENABLE_BACKEND_ACCESS_CONTROL"] = "false"
os.environ["MIGRATION_DB_PROVIDER"] = "postgres"
os.environ.setdefault("MIGRATION_DB_HOST", "127.0.0.1")
os.environ.setdefault("MIGRATION_DB_PORT", "5432")
os.environ.setdefault("MIGRATION_DB_NAME", "cognee_migration")
os.environ.setdefault("MIGRATION_DB_USERNAME", "cognee")
os.environ.setdefault("MIGRATION_DB_PASSWORD", "cognee")
import cognee
from cognee import SearchType
from cognee.infrastructure.databases.graph import get_graph_engine
from cognee.infrastructure.databases.relational import (
create_db_and_tables as create_relational_db_and_tables,
)
from cognee.infrastructure.databases.relational import (
get_migration_relational_engine,
)
from cognee.infrastructure.databases.vector.pgvector import (
create_db_and_tables as create_vector_db_and_tables,
)
from cognee.modules.ontology.ontology_config import Config
from cognee.modules.ontology.rdf_xml.RDFLibOntologyResolver import RDFLibOntologyResolver
from cognee.run_migrations import run_migrations
from cognee.tasks.ingestion import migrate_relational_database
CAR_MANUFACTURERS = [
(
"Audi",
"German car manufacturer known for engineering and the Quattro all-wheel drive system.",
),
(
"BMW",
"German car manufacturer focused on performance and driving pleasure.",
),
(
"Mercedes-Benz",
"German car manufacturer known for luxury sedans, SUVs, and commercial vehicles.",
),
(
"Porsche",
"German car manufacturer specializing in high-performance sports cars like the 911.",
),
(
"Volkswagen",
"German car manufacturer known for mass-market vehicles like the Golf.",
),
]
IT_COMPANIES = [
(
"Apple",
"Technology company known for consumer electronics and software such as iPhone and macOS.",
),
(
"Google",
"Technology company known for search, Android, and cloud services.",
),
(
"Microsoft",
"Technology company known for Windows, Office, and Azure cloud services.",
),
(
"Amazon",
"Technology company known for e-commerce and AWS cloud services.",
),
(
"Meta",
"Technology company known for social platforms and virtual reality products.",
),
]
PRODUCTS = [
# Car products
("Audi", "A4", "car", "sedan", 40000, 2023, "Audi A4 sedan with advanced safety features."),
(
"BMW",
"3 Series",
"car",
"sedan",
42000,
2023,
"BMW 3 Series sports sedan focused on driving dynamics.",
),
(
"Mercedes-Benz",
"C-Class",
"car",
"sedan",
45000,
2023,
"Mercedes-Benz C-Class luxury sedan.",
),
(
"Porsche",
"911",
"car",
"sports car",
120000,
2024,
"Porsche 911 high-performance sports car.",
),
("Volkswagen", "Golf", "car", "hatchback", 27000, 2022, "Volkswagen Golf compact hatchback."),
# IT products
("Apple", "iPhone", "device", "smartphone", 999, 2023, "Apple iPhone smartphone."),
("Google", "Pixel", "device", "smartphone", 899, 2023, "Google Pixel smartphone."),
("Microsoft", "Surface", "device", "laptop", 1199, 2022, "Microsoft Surface laptop."),
("Amazon", "Kindle", "device", "e-reader", 139, 2021, "Amazon Kindle e-reader."),
("Meta", "Quest", "device", "vr headset", 499, 2022, "Meta Quest VR headset."),
]
def _get_postgres_engine() -> sa.Engine:
# Requires a running Postgres database and a pre-created database (db_name).
# URL.create safely encodes credentials that contain URL-reserved characters.
connection_url = sa.URL.create(
"postgresql+psycopg2",
username=os.environ["MIGRATION_DB_USERNAME"],
password=os.environ["MIGRATION_DB_PASSWORD"],
host=os.environ["MIGRATION_DB_HOST"],
port=int(os.environ["MIGRATION_DB_PORT"]),
database=os.environ["MIGRATION_DB_NAME"],
)
return sa.create_engine(connection_url)
def create_example_postgres_db() -> None:
engine = _get_postgres_engine()
with engine.begin() as conn:
conn.execute(
sa.text(
"""
CREATE TABLE IF NOT EXISTS companies (
id SERIAL PRIMARY KEY,
name TEXT UNIQUE NOT NULL,
company_type TEXT NOT NULL
);
"""
)
)
conn.execute(
sa.text(
"""
CREATE TABLE IF NOT EXISTS car_manufacturers (
id SERIAL PRIMARY KEY,
company_id INTEGER UNIQUE NOT NULL REFERENCES companies(id),
name TEXT UNIQUE NOT NULL,
description TEXT NOT NULL
);
"""
)
)
conn.execute(
sa.text(
"""
CREATE TABLE IF NOT EXISTS it_companies (
id SERIAL PRIMARY KEY,
company_id INTEGER UNIQUE NOT NULL REFERENCES companies(id),
name TEXT UNIQUE NOT NULL,
description TEXT NOT NULL
);
"""
)
)
conn.execute(
sa.text(
"""
CREATE TABLE IF NOT EXISTS products (
id SERIAL PRIMARY KEY,
company_id INTEGER NOT NULL REFERENCES companies(id),
name TEXT NOT NULL,
product_type TEXT NOT NULL,
category TEXT NOT NULL,
price_usd INTEGER NOT NULL,
release_year INTEGER NOT NULL,
description TEXT NOT NULL
);
"""
)
)
# Reset tables for a clean run (handle FK constraints).
conn.execute(
sa.text("TRUNCATE TABLE products, car_manufacturers, it_companies, companies CASCADE;")
)
conn.execute(
sa.text("INSERT INTO companies (name, company_type) VALUES (:name, :company_type);"),
[{"name": name, "company_type": "car"} for name, _ in CAR_MANUFACTURERS]
+ [{"name": name, "company_type": "it"} for name, _ in IT_COMPANIES],
)
conn.execute(
sa.text(
"""
INSERT INTO car_manufacturers (company_id, name, description)
SELECT c.id, :name, :description
FROM companies c
WHERE c.name = :name;
"""
),
[{"name": name, "description": desc} for name, desc in CAR_MANUFACTURERS],
)
conn.execute(
sa.text(
"""
INSERT INTO it_companies (company_id, name, description)
SELECT c.id, :name, :description
FROM companies c
WHERE c.name = :name;
"""
),
[{"name": name, "description": desc} for name, desc in IT_COMPANIES],
)
conn.execute(
sa.text(
"""
INSERT INTO products (
company_id, name, product_type, category, price_usd, release_year, description
) VALUES (
(SELECT id FROM companies WHERE name = :company_name),
:name, :product_type, :category, :price_usd, :release_year, :description
);
"""
),
[
{
"company_name": company,
"name": name,
"product_type": product_type,
"category": category,
"price_usd": price_usd,
"release_year": release_year,
"description": description,
}
for company, name, product_type, category, price_usd, release_year, description in PRODUCTS
],
)
def fetch_texts_from_postgres() -> list[str]:
engine = _get_postgres_engine()
with engine.connect() as conn:
rows = conn.execute(
sa.text(
"""
SELECT name || ': ' || description FROM car_manufacturers
UNION ALL
SELECT name || ': ' || description FROM it_companies
UNION ALL
SELECT name || ': ' || description FROM products;
"""
)
).fetchall()
return [row[0] for row in rows if row and row[0]]
async def main(ontology_path: str = None):
# Create a small Postgres DB schema to migrate.
create_example_postgres_db()
# Ensure a reused local Cognee DB matches the current models before cleanup.
await create_relational_db_and_tables()
await run_migrations()
await cognee.forget(everything=True)
await create_vector_db_and_tables()
engine = get_migration_relational_engine()
schema = await engine.extract_schema()
graph = await get_graph_engine()
await migrate_relational_database(graph, schema=schema)
# Second pass: remember text content from the relational DB (optional ontology).
dataset_name = "migration_texts"
db_texts = fetch_texts_from_postgres()
if ontology_path:
graph_visualization_path = os.path.join(
os.path.dirname(__file__), ".artifacts", "complex_relational_db_ont.html"
)
config: Config = {
"ontology_config": {
"ontology_resolver": RDFLibOntologyResolver(ontology_file=ontology_path)
}
}
await cognee.remember(
db_texts,
dataset_name=dataset_name,
config=config,
self_improvement=False,
)
else:
graph_visualization_path = os.path.join(
os.path.dirname(__file__), ".artifacts", "complex_relational_db_no_ont.html"
)
await cognee.remember(db_texts, dataset_name=dataset_name, self_improvement=False)
results = await cognee.recall(
query_type=SearchType.GRAPH_COMPLETION,
query_text="Which companies are mentioned?",
top_k=50,
)
print(results)
await cognee.visualize_graph(graph_visualization_path)
async def _run():
await main(ontology_path="data/basic_ontology.owl")
await main()
if __name__ == "__main__":
asyncio.run(_run())
examples/demos/complex_relational_database_migration_example/data/basic_ontology.owl
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<?xml version="1.0" encoding="UTF-8"?>
<rdf:RDF
xmlns:ns1="http://example.org/ontology#"
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
>
<rdf:Description rdf:about="http://example.org/ontology#Volkswagen">
<rdfs:comment>Created for making cars accessible to everyone.</rdfs:comment>
<ns1:produces rdf:resource="http://example.org/ontology#VW_Golf"/>
<ns1:produces rdf:resource="http://example.org/ontology#VW_ID4"/>
<ns1:produces rdf:resource="http://example.org/ontology#VW_Touareg"/>
<rdf:type rdf:resource="http://example.org/ontology#CarManufacturer"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#Azure">
<rdf:type rdf:resource="http://example.org/ontology#CloudServiceProvider"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#Porsche">
<ns1:produces rdf:resource="http://example.org/ontology#Porsche_Cayenne"/>
<ns1:produces rdf:resource="http://example.org/ontology#Porsche_Taycan"/>
<ns1:produces rdf:resource="http://example.org/ontology#Porsche_911"/>
<rdf:type rdf:resource="http://example.org/ontology#CarManufacturer"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
<rdfs:comment>Famous for high-performance sports cars.</rdfs:comment>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#Meta">
<rdf:type rdf:resource="http://example.org/ontology#TechnologyCompany"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
<ns1:develops rdf:resource="http://example.org/ontology#Instagram"/>
<ns1:develops rdf:resource="http://example.org/ontology#Facebook"/>
<ns1:develops rdf:resource="http://example.org/ontology#Oculus"/>
<ns1:develops rdf:resource="http://example.org/ontology#WhatsApp"/>
<rdfs:comment>Pioneering social media and virtual reality technology.</rdfs:comment>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#TechnologyCompany">
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#Apple">
<rdf:type rdf:resource="http://example.org/ontology#TechnologyCompany"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
<rdfs:comment>Known for its innovative consumer electronics and software.</rdfs:comment>
<ns1:develops rdf:resource="http://example.org/ontology#iPad"/>
<ns1:develops rdf:resource="http://example.org/ontology#iPhone"/>
<ns1:develops rdf:resource="http://example.org/ontology#AppleWatch"/>
<ns1:develops rdf:resource="http://example.org/ontology#MacBook"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#Audi">
<ns1:produces rdf:resource="http://example.org/ontology#Audi_eTron"/>
<ns1:produces rdf:resource="http://example.org/ontology#Audi_R8"/>
<ns1:produces rdf:resource="http://example.org/ontology#Audi_A8"/>
<rdf:type rdf:resource="http://example.org/ontology#CarManufacturer"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
<rdfs:comment>Known for its modern designs and technology.</rdfs:comment>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#AmazonEcho">
<rdf:type rdf:resource="http://example.org/ontology#HardwareCompany"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#Porsche_Taycan">
<rdf:type rdf:resource="http://example.org/ontology#ElectricCar"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#BMW">
<ns1:produces rdf:resource="http://example.org/ontology#BMW_7Series"/>
<ns1:produces rdf:resource="http://example.org/ontology#BMW_M4"/>
<ns1:produces rdf:resource="http://example.org/ontology#BMW_iX"/>
<rdf:type rdf:resource="http://example.org/ontology#CarManufacturer"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
<rdfs:comment>Focused on performance and driving pleasure.</rdfs:comment>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#VW_Touareg">
<rdf:type rdf:resource="http://example.org/ontology#SUV"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#SportsCar">
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
<rdfs:subClassOf rdf:resource="http://example.org/ontology#Car"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#ElectricCar">
<rdfs:subClassOf rdf:resource="http://example.org/ontology#Car"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#Google">
<ns1:develops rdf:resource="http://example.org/ontology#GooglePixel"/>
<ns1:develops rdf:resource="http://example.org/ontology#GoogleCloud"/>
<ns1:develops rdf:resource="http://example.org/ontology#Android"/>
<ns1:develops rdf:resource="http://example.org/ontology#GoogleSearch"/>
<rdf:type rdf:resource="http://example.org/ontology#TechnologyCompany"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
<rdfs:comment>Started as a search engine and expanded into cloud computing and AI.</rdfs:comment>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#AmazonPrime">
<rdf:type rdf:resource="http://example.org/ontology#SoftwareCompany"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#Car">
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#WindowsOS">
<rdf:type rdf:resource="http://example.org/ontology#SoftwareCompany"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#Android">
<rdf:type rdf:resource="http://example.org/ontology#SoftwareCompany"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#Oculus">
<rdf:type rdf:resource="http://example.org/ontology#HardwareCompany"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#GoogleCloud">
<rdf:type rdf:resource="http://example.org/ontology#CloudServiceProvider"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#Microsoft">
<ns1:develops rdf:resource="http://example.org/ontology#Surface"/>
<ns1:develops rdf:resource="http://example.org/ontology#WindowsOS"/>
<ns1:develops rdf:resource="http://example.org/ontology#Azure"/>
<ns1:develops rdf:resource="http://example.org/ontology#Xbox"/>
<rdf:type rdf:resource="http://example.org/ontology#TechnologyCompany"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
<rdfs:comment>Dominant in software, cloud computing, and gaming.</rdfs:comment>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#GoogleSearch">
<rdf:type rdf:resource="http://example.org/ontology#SoftwareCompany"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#Mercedes_SClass">
<rdf:type rdf:resource="http://example.org/ontology#LuxuryCar"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#Audi_A8">
<rdf:type rdf:resource="http://example.org/ontology#LuxuryCar"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#Sedan">
<rdfs:subClassOf rdf:resource="http://example.org/ontology#Car"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#VW_Golf">
<rdf:type rdf:resource="http://example.org/ontology#Sedan"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#Facebook">
<rdf:type rdf:resource="http://example.org/ontology#SoftwareCompany"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#WhatsApp">
<rdf:type rdf:resource="http://example.org/ontology#SoftwareCompany"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#produces">
<rdfs:domain rdf:resource="http://example.org/ontology#CarManufacturer"/>
<rdfs:range rdf:resource="http://example.org/ontology#Car"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#ObjectProperty"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#BMW_7Series">
<rdf:type rdf:resource="http://example.org/ontology#LuxuryCar"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#BMW_M4">
<rdf:type rdf:resource="http://example.org/ontology#SportsCar"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#Audi_eTron">
<rdf:type rdf:resource="http://example.org/ontology#ElectricCar"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#Kindle">
<rdf:type rdf:resource="http://example.org/ontology#HardwareCompany"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#BMW_iX">
<rdf:type rdf:resource="http://example.org/ontology#ElectricCar"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#SoftwareCompany">
<rdfs:subClassOf rdf:resource="http://example.org/ontology#TechnologyCompany"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#Audi_R8">
<rdf:type rdf:resource="http://example.org/ontology#SportsCar"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#Xbox">
<rdf:type rdf:resource="http://example.org/ontology#HardwareCompany"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#Technology">
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#Mercedes_EQS">
<rdf:type rdf:resource="http://example.org/ontology#ElectricCar"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#Porsche_911">
<rdf:type rdf:resource="http://example.org/ontology#SportsCar"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#HardwareCompany">
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
<rdfs:subClassOf rdf:resource="http://example.org/ontology#TechnologyCompany"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#MercedesBenz">
<ns1:produces rdf:resource="http://example.org/ontology#Mercedes_SClass"/>
<ns1:produces rdf:resource="http://example.org/ontology#Mercedes_EQS"/>
<ns1:produces rdf:resource="http://example.org/ontology#Mercedes_AMG_GT"/>
<rdfs:comment>Synonymous with luxury and quality.</rdfs:comment>
<rdf:type rdf:resource="http://example.org/ontology#CarManufacturer"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#Amazon">
<rdf:type rdf:resource="http://example.org/ontology#TechnologyCompany"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
<ns1:develops rdf:resource="http://example.org/ontology#Kindle"/>
<ns1:develops rdf:resource="http://example.org/ontology#AmazonEcho"/>
<ns1:develops rdf:resource="http://example.org/ontology#AWS"/>
<ns1:develops rdf:resource="http://example.org/ontology#AmazonPrime"/>
<rdfs:comment>From e-commerce to cloud computing giant with AWS.</rdfs:comment>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#Instagram">
<rdf:type rdf:resource="http://example.org/ontology#SoftwareCompany"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#AWS">
<rdf:type rdf:resource="http://example.org/ontology#CloudServiceProvider"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#SUV">
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
<rdfs:subClassOf rdf:resource="http://example.org/ontology#Car"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#VW_ID4">
<rdf:type rdf:resource="http://example.org/ontology#ElectricCar"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#CloudServiceProvider">
<rdfs:subClassOf rdf:resource="http://example.org/ontology#TechnologyCompany"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#Surface">
<rdf:type rdf:resource="http://example.org/ontology#HardwareCompany"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#iPad">
<rdf:type rdf:resource="http://example.org/ontology#HardwareCompany"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#iPhone">
<rdf:type rdf:resource="http://example.org/ontology#HardwareCompany"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#Mercedes_AMG_GT">
<rdf:type rdf:resource="http://example.org/ontology#SportsCar"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#MacBook">
<rdf:type rdf:resource="http://example.org/ontology#HardwareCompany"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#develops">
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#ObjectProperty"/>
<rdfs:range rdf:resource="http://example.org/ontology#Technology"/>
<rdfs:domain rdf:resource="http://example.org/ontology#TechnologyCompany"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#LuxuryCar">
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
<rdfs:subClassOf rdf:resource="http://example.org/ontology#Car"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#AppleWatch">
<rdf:type rdf:resource="http://example.org/ontology#HardwareCompany"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#Porsche_Cayenne">
<rdf:type rdf:resource="http://example.org/ontology#SUV"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#GooglePixel">
<rdf:type rdf:resource="http://example.org/ontology#HardwareCompany"/>
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#NamedIndividual"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#Company">
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
</rdf:Description>
<rdf:Description rdf:about="http://example.org/ontology#CarManufacturer">
<rdf:type rdf:resource="http://www.w3.org/2002/07/owl#Class"/>
<rdfs:subClassOf rdf:resource="http://example.org/ontology#Company"/>
</rdf:Description>
</rdf:RDF>