Lecture
This lecture covers popular ontologies and knowledge bases such as WordNet, WikiData, Google Knowledge Graph, and Schema.org. WordNet is an English dictionary with semantic relationships, including synonymy, antonymy, hypernymy, hyponymy, and meronymy. WikiData provides structured data, while Google Knowledge Graph is Google's internal knowledge base enriched with schema.org. Schema.org is a collaborative effort to create schemas for structured data on the web, used by various knowledge bases. The lecture also discusses Linked Open Data, which is a repository of open data and knowledge bases. Examples of Linked Open Data sets available as RDF dumps are provided, showcasing the vast amount of data accessible in this format.