RDF4J
RDF4J (formerly known as Sesame) is an open-source Java framework for processing and storing RDF (Resource Description Framework) data, which is a standard model for data interchange on the web. It provides APIs for parsing, querying, reasoning, and managing RDF data, supporting SPARQL queries and various RDF serialization formats like RDF/XML, Turtle, and JSON-LD. The framework includes both an in-memory store and connectors to external triplestores, enabling developers to build semantic web applications and linked data systems.
Developers should learn RDF4J when working on projects involving semantic web technologies, linked data, or knowledge graphs, as it simplifies handling RDF data in Java environments. It is particularly useful for applications requiring data integration from diverse sources, ontology management, or advanced querying with SPARQL, such as in academic research, enterprise data lakes, or AI-driven systems that rely on structured knowledge representation.