OWL Ontology Editor

The Online OWL Editor provides a web-based environment for creating, editing, validating, and exporting OWL ontologies. It accepts RDF/XML, Turtle, or OWL/XML representations, enforces syntax correctness, and supports OWL 2 DL semantics. Ontology engineers, researchers, and data scientists use it to define classes, properties, and axioms, import existing ontologies, run validations, and prepare artifacts for deployment or publication.
Conceptually, the editor parses input with a format-specific parser, builds an internal representation, and applies namespace resolution and IRI management. A built-in reasoner interface can run HermiT or Pellet to check consistency and derive inferences such as subclass hierarchies and property characteristics. The system can export the ontology in multiple serializations and can produce a machine-readable summary of inferences.
Audience and value: knowledge engineers, domain experts, and educators benefit from immediate feedback during ontology construction, reduced syntax errors, and streamlined integration with knowledge graphs and data pipelines. The tool is designed for iterative editing, reproducible exports, and alignment with OWL 2 DL standards.
Core features and use cases include syntax validation, reasoner integration, multi-format export, prefix management, and URL-based imports to support typical workflows like ontology import, schema mapping, and ontology enrichment. Use cases span medical ontologies, bibliographic taxonomies, and product ontologies for e-commerce.