We propose a model that assists in understanding indexing on the World Wide Web (WWW). This model speciies key feature of indexing strategies that are currently being used. We also present an experiment assessing the validity of Inverse Document Frequency (IDF) as a term weighting strategy for WWW documents. The experiment indicates that IDF scores are not stable in the heterogeneous and dynami...

A number of powerful technologies which prove to be very effective for 'on-site' education are still not implemented within the WWW framework . One of these technologies is Intelligent Tutoring Systems (ITS) technology . This paper discusses some ways of bringing ITS technology to WWW. We review briefly two techniques from the domain of ITS which could be creatively used with WWW and introduce ...