Rowlands, ThomasHawking, DavidSankaranarayana, Ramesh S2015-12-10December 89781921426216http://hdl.handle.net/1885/50815Tags and emergent folksonomies are a potentially rich new source of document annotations, offering query independent and dependent evidence for exploitation by information retrieval systems. Previous research has shown that tags may facilitate improved web search in an environment where each tagging action generates a (user, tag, resource) triple. For websites operated by a public institution, operational or privacy concerns may prevent the recording of data capable of identifying individuals. This leads to a simpler anonymous tagging system but is likely to reduce user motivation for tagging, since the user cannot access their own set of tags. It also means that votes for tags are not counted, and a potentially useful joining attribute is not available. Using webpage, metadata, query, click, anchortext and tag data provided by a public museum, we demonstrate that, despite these limitations, tag data collected by an anonymous tagging system has the potential to improve retrieval effectiveness.Keywords: Document annotation; Folksonomies; Information storage and retrieval; New sources; Privacy concerns; Public institution; Retrieval effectiveness; Small enterprise; Tagging systems; User motivation; Web searches; Web-page; Information retrieval systems; Me Information Storage and Retrieval20082016-02-24