Recommendation and Usage in the Digital Library LANCASTER UNI VERSITY Computing Department David M Nichols, Michael B Twidale and Chris D Paice Cooperative Systems Engineering Group Technical Report Ref: CSEG/2/1997 http://www.comp.lancs.ac.uk/computing/research/cseg/97_rep.html ABSTRACT The movement from the physical to the digital library offers both dangers and opportunities. Alongside the greater quantity of online material goes the problem of quality assurance: how can be the information searcher be sure of the status of a document. We suggest that this be addressed by supporting recommendations and that the key feature that links these recommendations together is that of usage. The main use of usage data within information science is currently that of a research tool in the form of transaction log analysis. In a digital library this data, together with other evaluations and recommendations, can enrich the existing information structure. Several approaches t o the integration of usage data are described together with their respective costs and benefits. The social implications of these possibilities are discussed with particular reference to the privacy of usage data. CSEG, Computing Department, Lancaster University, Lancaster, LA1 4YR, UK Tel: +44-1524-65201 Ext 93799; Fax: +44-1524-593608; E-Mail: julie@comp.lancs.ac.uk http://www.comp.lancs.ac.uk/computing/research/cseg/