Managing Changes in Knowledge Organization Systems Through Linked Data Technologies: The Case of UDC

Part of the “Technology Matters” subtheme at the IFLA 2025 metadata symposium in Athens, this presentation explores how Linked Data (LD) technologies can help libraries manage evolving knowledge organization systems. While classification systems like the Universal Decimal Classification (UDC) are regularly updated, bibliographic data often retains outdated classmarks, complicating access and discoverability. Using UDC as a case study, the presentation introduces the UDC Linked Data look-up service—developed through the Digging Into the Knowledge Graph project—which processes URIs and extended RDF records, including deprecated terms. The service enables libraries to connect older and newer metadata, improving navigation and enriching discovery through current terminology, even when collections remain organized under older schemes.