User Preferences for Searching in Web Sources

Main topic of this paper are user preferences in sematic web environment. We describe a model for querying with user preferences upon RDF data and for ordering of the answer by user aggregation function. Our model has a theoretical base in modification of fuzzy description logic, which is embedable into two-value description logic and extends OWL. We desceribes also experiments, which were done using framework for flexible querying Tokaf. We extended standard algorithms for searching k bet answers, using new heuristics. These heuristics were also teste