12. The method of claim 11 wherein said step of searching comprises: identifying documents in the information space containing the search query; and determining which, if any, of the identified documents belong to a region in said first region-set.
12. The method of claim 11 wherein said step of searching comprises: identifying documents in the information space containing the search query; and determining which, if any, of the identified documents belong to a region in said first region-set. 14. The method of claim 12 wherein said hierarchically structured information space is organized using file pathnames.