$db = undef; # the DB_File handle
%prefix_loc = (); # the meat of the info
%pre = (); # the prefix list
%cache = (); # a runtime cache of matched prefixes
$lasttime = 0; # last time this cache was cleared
$db = undef; # the DB_File handle
%prefix_loc = (); # the meat of the info
%pre = (); # the prefix list
%cache = (); # a runtime cache of matched prefixes
$lasttime = 0; # last time this cache was cleared