RDF/XML
RDF/XML is an XML-based serialization format for representing Resource Description Framework (RDF) data, which structures information as triples (subject-predicate-object) for semantic web applications. It encodes RDF graphs in XML syntax, allowing machine-readable representation of metadata and linked data. This format was one of the original W3C standards for RDF, enabling interoperability in web-based knowledge representation.
Developers should learn RDF/XML when working with semantic web technologies, linked data projects, or metadata-heavy applications like digital libraries and knowledge graphs. It is particularly useful for legacy systems or environments requiring XML compatibility, such as integrating RDF data with existing XML-based workflows or tools like SPARQL endpoints that support this format.