--- loncom/lonnet/perl/lonnet.pm	2001/11/22 19:02:07	1.176
+++ loncom/lonnet/perl/lonnet.pm	2001/11/22 20:09:22	1.177
@@ -37,7 +37,7 @@
 # 10/5,10/10,11/13,11/15 Scott Harrison
 # 11/17,11/20,11/22 Gerd Kortemeyer
 #
-# $Id: lonnet.pm,v 1.176 2001/11/22 19:02:07 www Exp $
+# $Id: lonnet.pm,v 1.177 2001/11/22 20:09:22 www Exp $
 #
 ###
 
@@ -2239,7 +2239,7 @@ sub metadata {
     $uri=~s/\.meta$//;
 #
 # Is the metadata already cached?
-# If "keys" are set, the assumption is that everything is already cached.
+# Look at timestamp of caching
 # Everything is cached by the main uri, libraries are never directly cached
 #
     unless (abs($metacache{$uri.':cachedtimestamp'}-time)<600) {
@@ -2326,12 +2326,12 @@ sub metadata {
 		 if (defined($depthcount)) { $depthcount++; } else 
                                            { $depthcount=0; }
                  if ($depthcount<20) {
-		    $metacache{$uri.':keys'}.=','.
-		    &metadata($uri,'keys',
-                              $parser->get_text('/import'),$unikey,
-                              $depthcount);
+		     map {
+                         $metathesekeys{$_}=1;
+		     } split(/\,/,&metadata($uri,'keys',
+                                  $parser->get_text('/import'),$unikey,
+                                  $depthcount));
 		 }
-
              } else { 
 
               if (defined($token->[2]->{'name'})) { 
@@ -2355,6 +2355,7 @@ sub metadata {
        }
        $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
        $metacache{$uri.':cachedtimestamp'}=time;
+# this is the end of "was not already recently cached
     }
     return $metacache{$uri.':'.$what};
 }