OntoAligner 1.5.1

OntoAligner: A Comprehensive Modular and Robust Python Toolkit for Ontology Alignment.

OntoAligner: A Comprehensive Modular and Robust Python Toolkit for Ontology Alignment

OntoAligner is a Python library designed to simplify ontology alignment and matching for researchers, practitioners, and developers. With a modular architecture and robust features, OntoAligner provides powerful tools to bridge ontologies effectively.

🧪 Installation

You can install OntoAligner from PyPI using pip:

pip install ontoaligner

Alternatively, to get the latest version directly from the source, use the following commands:

git clone [e-mail]:sciknoworg/OntoAligner.git
pip install ./ontoaligner

Next, verify the installation:

import ontoaligner

print(ontoaligner.__version__)

📚 Documentation

Comprehensive documentation for OntoAligner, including detailed guides and examples, is available at ontoaligner.readthedocs.io. Below are some key tutorials with links to both the documentation and the corresponding example codes.

Example	Tutorial	Script
Lightweight	📚 Fuzzy Matching	📝 Code
Retrieval	📚 Retrieval Aligner	📝 Code
Large Language Models	📚 LLM Aligner	📝 Code
Retrieval Augmented Generation	📚 RAG Aligner	📝 Code
FewShot	📚 FewShot-RAG Aligner	📝 Code
In-Context Vectors Learning	📚 In-Context Vectors RAG	📝 Code
Knowledge Graph Embedding	📚 KGE Aligner	📝 Code
eCommerce	📚 Product Alignment in eCommerce	📝 Code

🚀 Quick Tour

Below is an example of using Retrieval-Augmented Generation (RAG) step-by-step approach for ontology matching:

from ontoaligner.ontology import MaterialInformationMatOntoOMDataset
from ontoaligner.utils import metrics, xmlify
from ontoaligner.aligner import MistralLLMBERTRetrieverRAG
from ontoaligner.encoder import ConceptParentRAGEncoder
from ontoaligner.postprocess import rag_hybrid_postprocessor

# Step 1: Initialize the dataset object for MaterialInformation MatOnto dataset
task = MaterialInformationMatOntoOMDataset()
print("Test Task:", task)

# Step 2: Load source and target ontologies along with reference matchings
dataset = task.collect(
    source_ontology_path="assets/MI-MatOnto/mi_ontology.xml",
    target_ontology_path="assets/MI-MatOnto/matonto_ontology.xml",
    reference_matching_path="assets/MI-MatOnto/matchings.xml"
)

# Step 3: Encode the source and target ontologies
encoder_model = ConceptParentRAGEncoder()
encoded_ontology = encoder_model(source=dataset['source'], target=dataset['target'])

# Step 4: Define configuration for retriever and LLM
retriever_config = {"device": 'cuda', "top_k": 5,}
llm_config = {"device": "cuda", "max_length": 300, "max_new_tokens": 10, "batch_size": 15}

# Step 5: Initialize Generate predictions using RAG-based ontology matcher
model = MistralLLMBERTRetrieverRAG(retriever_config=retriever_config, llm_config=llm_config)
model.load(llm_path = "mistralai/Mistral-7B-v0.3", ir_path="all-MiniLM-L6-v2")
predicts = model.generate(input_data=encoded_ontology)

# Step 6: Apply hybrid postprocessing
hybrid_matchings, hybrid_configs = rag_hybrid_postprocessor(predicts=predicts,
                                                            ir_score_threshold=0.1,
                                                            llm_confidence_th=0.8)

evaluation = metrics.evaluation_report(predicts=hybrid_matchings, references=dataset['reference'])
print("Hybrid Matching Evaluation Report:", evaluation)

# Step 7: Convert matchings to XML format and save the XML representation
xml_str = xmlify.xml_alignment_generator(matchings=hybrid_matchings)
open("matchings.xml", "w", encoding="utf-8").write(xml_str)

Ontology alignment pipeline using RAG method:

import ontoaligner

pipeline = ontoaligner.OntoAlignerPipeline(
    task_class=ontoaligner.ontology.MouseHumanOMDataset,
    source_ontology_path="assets/MI-MatOnto/mi_ontology.xml",
    target_ontology_path="assets/MI-MatOnto/matonto_ontology.xml",
    reference_matching_path="assets/MI-MatOnto/matchings.xml",
)

matchings, evaluation = pipeline(
    method="rag",
    encoder_model=ontoaligner.encoder.ConceptRAGEncoder(),
    model_class=ontoaligner.aligner.MistralLLMBERTRetrieverRAG,
    postprocessor=ontoaligner.postprocess.rag_hybrid_postprocessor,
    llm_path='mistralai/Mistral-7B-v0.3',
    retriever_path='all-MiniLM-L6-v2',
    llm_threshold=0.5,
    ir_rag_threshold=0.7,
    top_k=5,
    max_length=512,
    max_new_tokens=10,
    device='cuda',
    batch_size=32,
    return_matching=True,
    evaluate=True
)

print("Matching Evaluation Report:", evaluation)

⭐ Contribution

We welcome contributions to enhance OntoAligner and make it even better! Please review our contribution guidelines in CONTRIBUTING.md before getting started. You are also welcome to assist with the ongoing maintenance by referring to MAINTENANCE.md. Your support is greatly appreciated.

If you encounter any issues or have questions, please submit them in the GitHub issues tracker.

💡 Acknowledgements

If you use OntoAligner in your work or research, please cite the following preprint:

@inproceedings{babaei2025ontoaligner,
  title={OntoAligner: A Comprehensive Modular and Robust Python Toolkit for Ontology Alignment},
  author={Babaei Giglou, Hamed and D’Souza, Jennifer and Karras, Oliver and Auer, S{\"o}ren},
  booktitle={European Semantic Web Conference},
  pages={174--191},
  year={2025},
  organization={Springer}
}

This software is archived in Zenodo under the DOI and is licensed under .