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Edizioni Centro Studi Erickson Loc. Spini di Gardolo 38014 GARDOLO (TN) Tel. 0461 950690 fax 0461 950698
Abstract
In this contribution we propose a comparison between two distinct
approaches to the annotation of digital resources. The former, top-down, is
rooted in the cathedral model and is based on an authoritative, centralized
definition of the adopted mark-up language; the latter, bottom-up, refers to
the bazaar model and is based on the contributions of a community of users.
These two approaches are analyzed taking into account both their descriptive
potential and the constraints they impose on the reasoning process of
recommender systems, with special reference to user profiling. Three case
studies are described, with reference to research projects that apply these
approaches in the contexts of e-learning and knowledge management
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