| 摘要 |
<p>A system having: means (50) to cause periodic interrogation of one or more databases (40) containing a catalogue of available airfares and a library of rules of validity of each of the airfares, means to parse the rules using regular expression technology and to download the rules and airfares into a normalised database, and enquiry means containing a set of standard questions for selection by a user which selects a list of fares complying with the user selected questions and causes the list to be presented to the enquirer.</p> |
