My main research interests are in Knowledge Organization Systems (KOS) and Services. I am interested in how semantically indexed hypermedia systems can assist interactive and automatic retrieval. KOS (eg classifications, gazetteers, ontologies, taxonomies and thesauri) provide controlled vocabularies which model semantic structure for the purpose of facilitating information retrieval. A vast legacy of different types of KOS for different domains is available. Formally expressed they can offer a cost-effective lightweight semantics for a wide range of online services and linked data. Current research explores KOS-based Named Entity Recognition and Natural Language Processing for (semi) automatic indexing of datasets and reports in archaeology and digital heritage.

Editor, The New Review of Hypermedia and Multimedia (formerly Hypermedia), 1997 - 2022, Taylor&Francis.

Member of the ISO TC46/SC9/SC8 (and NISO) working group that developed the new thesaurus standard (ISO 25964).

Co-Organisor of NKOS Workshops

Co-edited various NKOS special issues

For past and current projects and external funding, see the Hypermedia Research Group