| http://www.w3.org/ns/prov#value | - In a self-service system of selling travel-related services or products by means of an interactive travel service system functioning like a travel agent, to simplify the search process by the system and the decision process by the user, the user is first queried as to travel knowledge, such as whether the user is a first-time visitor or is otherwise familiar with the travel destination, and as to
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