OWL DL (Web Ontology Language Description Logic) is a formal language used to create and represent ontologies on the web. It allows for the definition of classes, properties, and relationships in a structured way, enabling machines to understand and process complex information. OWL DL is designed to balance expressiveness and computational efficiency, making it suitable for applications that require reasoning about data. One of the key features of OWL DL is its support for reasoning, which allows systems to infer new knowledge from existing information. This capability is essential for applications in areas like semantic web, knowledge management, and artificial intelligence, where understanding relationships and hierarchies is crucial for effective data utilization.