Αντικείμενα, σελίδες, forum, σχόλια. The following form allows you to select in AND/OR a set of fields and for each of them provide a possible patter and string. Thus, each of the following fields may be string, date, etc. When the population of the values of a given field is smaller than 200, the possible values are offered in a list box to help the user in selecting possible value. When a date is formally produced by the portal a perfect semantic usage is possible, so that formal calendar is provided to define the time interval or the match, otherwise (the date is not formally consisten defined) thus a string should be inserted in searching for those dates.