Ontological user profiling in recommender systems

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\begin{bibtex} @article{DBLP:journals/tois/MiddletonSR04, title={Ontological user profiling in recommender systems}, pages={54-88}, year={2004}, volume={22}, journal={ACM Trans. Inf. Syst.}, number={1}, ee={http://doi.acm.org/10.1145/963770.963773}, url={http://www.informatik.uni-trier.de/~ley/db/journals/tois/tois22.html#MiddletonSR04}, author={Stuart E. Middleton and Nigel Shadbolt and David De Roure} }\end{bibtex}