Information retrieval interaction and user behaviour, user-centred search term selection and query expansion, Knowledge organization systems in digital libraries, Web-based thesaurus interfaces and applications, social tagging, visual interfaces to digital libraries, ...
Information retrieval interaction and user behaviour, user-centred search term selection and query expansion, Knowledge organization systems in digital libraries, Web-based thesaurus interfaces and applications, social tagging, visual interfaces to digital libraries, subject-based information gateways, metadata and Internet resource organization