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was one of the reasons for the way that we have assigned importance measures to
individual features (as belonging to the interval [0,1]). Recall here that the DBA
and the PIA know nothing about user preferences and that the PIA uses a variety
of general rules to increase the response set beyond that provided as a response to
the original query.
To calculate the temperature of a travel object (let us name it an active object) three
aspects of the situation have to be taken into account. First, features of the active
object. Second, user interests represented in the user profile??”if a given feature has
no preference specified then it cannot be used. In other words, for each token in
the MRS we will crop its ontological graph to represent only these features that are
defined in user profile. Third, features requested in user query. More specifically, if
given keywords appear in the query (representing explicit wishes of the user), for
example, if the query was about a restaurant in Las Vegas, then such restaurants
should be presented to the user first.
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