Ontology Viewer is a simple Streamlit-based application designed to visualize and interact with ontology graphs. It provides functionalities to explore namespaces, classes, properties, and visualize hierarchical relationships within the ontology.

• Graph Status Page: Visualize namespaces, classes, and properties.
• Class Hierarchy: Display class inheritance relationships.
• Property Hierarchy: Display property inheritance relationships.
• Metadata Display: Show detailed metadata for selected nodes.
• Ontology Export: Export the ontology graph to a file.

1. Clone the repository:

   git clone <repository-url>
   cd OntoViewer

2. Install the required dependencies:

   pip install -r requirements.txt

1. Run the application:

   streamlit run app.py

2. Upload an ontology file (TTL, RDF, OWL) to start visualizing the ontology graph.

• app.py: Main entry point for the Streamlit application.
• onto_viewer/: Contains the core modules for the application.
  • apps/: Application-specific modules.
    • viewer.py: Main application logic for the Ontology Viewer.
  • utils/: Utility modules for various functionalities.
    • echarts.py: Utility functions for Echarts visualizations.
    • graph_algo.py: Utility functions for graph algorithms.
  • namespaces.py: Namespace definitions and utilities.
• resources/ontologies/: Directory containing ontology files.
  • DUL.owl.ttl: Example ontology file.

Entry:

Main:

Namespace:

Classes:

Properties:

Instances:

Contributions are welcome! Please fork the repository and submit pull requests.

This project is licensed under the MIT License.

The project requires the following dependencies:

• numpy==2.2.3
• pandas==2.2.3
• pydantic==2.10.6
• rdflib==7.1.3
• streamlit==1.42.0
• streamlit_echarts==0.4.0
• streamlit_extras==0.5.5

• Add support for SKOS-based semantics.
• Add SPARQL query functionality.
• Add functionality to create new classes.
• Add functionality to create new properties.
• Add functionality to display and set domain and range for properties.