--- loncom/lonnet/perl/lonnet.pm	2001/03/19 22:27:06	1.109
+++ loncom/lonnet/perl/lonnet.pm	2001/08/09 19:28:47	1.147
@@ -3,8 +3,9 @@
 #
 # Functions for use by content handlers:
 #
-# metadata_query(sql-query-string) : returns file handle of where sql
-#                                    results will be stored for query
+# metadata_query(sql-query-string,custom-metadata-regex) : 
+#                                    returns file handle of where sql and
+#                                    regex results will be stored for query
 # plaintext(short)   : plain text explanation of short term
 # fileembstyle(ext)  : embed style in page for file extension
 # filedescription(ext) : descriptor text for file extension
@@ -27,15 +28,39 @@
 # revokecustomrole (udom,uname,url,rdom,rnam,rolename) : Revoke a custom role
 # appenv(hash)       : adds hash to session environment
 # delenv(varname)    : deletes all environment entries starting with varname
-# store(hash)        : stores hash permanently for this url
-# cstore(hash)       : critical store
-# restore            : returns hash for this url
-# eget(namesp,array) : returns hash with keys from array filled in from namesp
-# get(namesp,array)  : returns hash with keys from array filled in from namesp
-# del(namesp,array)  : deletes keys out of array from namesp
-# put(namesp,hash)   : stores hash in namesp
-# cput(namesp,hash)  : critical put
-# dump(namesp)       : dumps the complete namespace into a hash
+# store(hashref,symb,courseid,udom,uname)
+#                    : stores hash permanently for this url
+#                      hashref needs to be given, and should be a \%hashname
+#                      the remaining args aren't required and if they aren't
+#                      passed or are '' they will be derived from the ENV
+# cstore(hashref,symb,courseid,udom,uname)
+#                    : same as store but uses the critical interface to 
+#                      guarentee a store
+# restore(symb,courseid,udom,uname)
+#                    : returns hash for this symb, all args are optional
+#                      if they aren't given they will be derived from the 
+#                      current enviroment
+#
+#
+# for the next 6 functions udom and uname are optional
+#         if supplied they use udom as the domain and uname
+#         as the username for the function (supply a courseid
+#         for the uname if you want a course database)
+#         if not supplied it uses %ENV and looks at 
+#         user. attribute for the values
+#
+# eget(namesp,arrayref,udom,uname)
+#                    : returns hash with keys from array  reference filled
+#                      in from namesp (encrypts the return communication)
+# get(namesp,arrayref,udom,uname)
+#                    : returns hash with keys from array  reference filled
+#                      in from namesp
+# dump(namesp,udom,uname) : dumps the complete namespace into a hash
+# del(namesp,array,udom,uname)  : deletes keys out of array from namesp
+# put(namesp,hash,udom,uname)   : stores hash in namesp
+# cput(namesp,hash,udom,uname)  : critical put
+#
+#
 # ssi(url,hash)      : does a complete request cycle on url to localhost, posts
 #                      hash
 # coursedescription(id) : returns and caches course description for id
@@ -51,7 +76,7 @@
 # receipt()          : returns a receipt to be given out to users 
 # getfile(filename)  : returns the contents of filename, or a -1 if it can't
 #                      be found, replicates and subscribes to the file
-# filelocation(dir,file) : returns a farily clean absolute reference to file 
+# filelocation(dir,file) : returns a fairly clean absolute reference to file 
 #                          from the directory dir
 # hreflocation(dir,file) : same as filelocation, but for hrefs
 # log(domain,user,home,msg) : write to permanent log for user
@@ -90,8 +115,14 @@
 # 09/01,10/01,11/01 Gerd Kortemeyer
 # 02/27/01 Scott Harrison
 # 3/2 Gerd Kortemeyer
-# 3/15 Scott Harrison
-# 3/19 Gerd Kortemeyer
+# 3/15,3/19 Scott Harrison
+# 3/19,3/20 Gerd Kortemeyer
+# 3/22,3/27,4/2,4/16,4/17 Scott Harrison
+# 5/26,5/28 Gerd Kortemeyer
+# 5/30 H. K. Ng
+# 6/1 Gerd Kortemeyer
+# July Guy Albertelli
+# 8/4,8/7,8/8,8/9 Gerd Kortemeyer
 
 package Apache::lonnet;
 
@@ -100,7 +131,7 @@ use Apache::File;
 use LWP::UserAgent();
 use HTTP::Headers;
 use vars 
-qw(%perlvar %hostname %homecache %spareid %hostdom %libserv %pr %prp %fe %fd $readit %metacache);
+qw(%perlvar %hostname %homecache %spareid %hostdom %libserv %pr %prp %fe %fd $readit %metacache %packagetab);
 use IO::Socket;
 use GDBM_File;
 use Apache::Constants qw(:common :http);
@@ -628,6 +659,23 @@ sub log {
     return critical("log:$dom:$nam:$what",$hom);
 }
 
+# --------------------------------------------- Set Expire Date for Spreadsheet
+
+sub expirespread {
+    my ($uname,$udom,$stype,$usymb)=@_;
+    my $cid=$ENV{'request.course.id'}; 
+    if ($cid) {
+       my $now=time;
+       my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
+       return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
+                            $ENV{'course.'.$cid.'.num'}.
+	        	    ':nohist_expirationdates:'.
+                            &escape($key).'='.$now,
+                            $ENV{'course.'.$cid.'.home'})
+    }
+    return 'ok';
+}
+
 # ----------------------------------------------------- Devalidate Spreadsheets
 
 sub devalidate {
@@ -636,79 +684,97 @@ sub devalidate {
     if ($cid) {
 	my $key=$ENV{'user.name'}.':'.$ENV{'user.domain'}.':';
         my $status=
-          &reply('del:'.$ENV{'course.'.$cid.'.domain'}.':'.
-                        $ENV{'course.'.$cid.'.num'}.
-	                ':nohist_calculatedsheets:'.
-                        &escape($key.'studentcalc:'),
-                        $ENV{'course.'.$cid.'.home'})
-          .' '.
-          &reply('del:'.$ENV{'user.domain'}.':'.
-                        $ENV{'user.name'}.
-		        ':nohist_calculatedsheets_'.$cid.':'.
-                        &escape($key.'assesscalc:'.$symb),
-                        $ENV{'user.home'});
+	    &del('nohist_calculatedsheet',
+		 [$key.'studentcalc'],
+		 $ENV{'course.'.$cid.'.domain'},
+		 $ENV{'course.'.$cid.'.num'})
+		.' '.
+	    &del('nohist_calculatedsheets_'.$cid,
+		 [$key.'assesscalc:'.$symb]);
         unless ($status eq 'ok ok') {
            &logthis('Could not devalidate spreadsheet '.
                     $ENV{'user.name'}.' at '.$ENV{'user.domain'}.' for '.
 		    $symb.': '.$status);
-        } 
+        }
     }
 }
 
 # ----------------------------------------------------------------------- Store
 
 sub store {
-    my %storehash=@_;
-    my $symb;
-    unless ($symb=&symbread()) { return ''; }
+    my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
+    my $home='';
+
+    if ($stuname) {
+	$home=&homeserver($stuname,$domain);
+    }
+
+    if (!$symb) { unless ($symb=&symbread()) { return ''; } }
 
     &devalidate($symb);
 
     $symb=escape($symb);
-    my $namespace;
-    unless ($namespace=$ENV{'request.course.id'}) { return ''; }
+    if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } }
+    if (!$domain) { $domain=$ENV{'user.domain'}; }
+    if (!$stuname) { $stuname=$ENV{'user.name'}; }
+    if (!$home) { $home=$ENV{'user.home'}; }
     my $namevalue='';
     map {
-        $namevalue.=escape($_).'='.escape($storehash{$_}).'&';
-    } keys %storehash;
+        $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
+    } keys %$storehash;
     $namevalue=~s/\&$//;
-    return reply(
-     "store:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$symb:$namevalue",
-		 "$ENV{'user.home'}");
+    return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
 }
 
 # -------------------------------------------------------------- Critical Store
 
 sub cstore {
-    my %storehash=@_;
-    my $symb;
-    unless ($symb=&symbread()) { return ''; }
+    my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
+    my $home='';
+
+    if ($stuname) {
+	$home=&homeserver($stuname,$domain);
+    }
+
+    if (!$symb) { unless ($symb=&symbread()) { return ''; } }
 
     &devalidate($symb);
 
     $symb=escape($symb);
-    my $namespace;
-    unless ($namespace=$ENV{'request.course.id'}) { return ''; }
+    if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } }
+    if (!$domain) { $domain=$ENV{'user.domain'}; }
+    if (!$stuname) { $stuname=$ENV{'user.name'}; }
+    if (!$home) { $home=$ENV{'user.home'}; }
+
     my $namevalue='';
     map {
-        $namevalue.=escape($_).'='.escape($storehash{$_}).'&';
-    } keys %storehash;
+        $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
+    } keys %$storehash;
     $namevalue=~s/\&$//;
-    return critical(
-     "store:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$symb:$namevalue",
-		 "$ENV{'user.home'}");
+    return critical("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
 }
 
 # --------------------------------------------------------------------- Restore
 
 sub restore {
-    my $symb;
-    unless ($symb=escape(&symbread())) { return ''; }
-    my $namespace;
-    unless ($namespace=$ENV{'request.course.id'}) { return ''; }
-    my $answer=reply(
-              "restore:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$symb",
-              "$ENV{'user.home'}");
+    my ($symb,$namespace,$domain,$stuname) = @_;
+    my $home='';
+
+    if ($stuname) {
+	$home=&homeserver($stuname,$domain);
+    }
+
+    if (!$symb) {
+      unless ($symb=escape(&symbread())) { return ''; }
+    } else {
+      $symb=&escape($symb);
+    }
+    if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } }
+    if (!$domain) { $domain=$ENV{'user.domain'}; }
+    if (!$stuname) { $stuname=$ENV{'user.name'}; }
+    if (!$home) { $home=$ENV{'user.home'}; }
+    my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
+
     my %returnhash=();
     map {
 	my ($name,$value)=split(/\=/,$_);
@@ -730,22 +796,18 @@ sub coursedescription {
     $courseid=~s/^\///;
     $courseid=~s/\_/\//g;
     my ($cdomain,$cnum)=split(/\//,$courseid);
-    my $chome=homeserver($cnum,$cdomain);
+    my $chome=&homeserver($cnum,$cdomain);
     if ($chome ne 'no_host') {
-       my $rep=reply("dump:$cdomain:$cnum:environment",$chome);
-       if ($rep ne 'con_lost') {
+       my %returnhash=&dump('environment',$cdomain,$cnum);
+       if (!exists($returnhash{'con_lost'})) {
            my $normalid=$cdomain.'_'.$cnum;
            my %envhash=();
-           my %returnhash=('home'   => $chome, 
-                           'domain' => $cdomain,
-                           'num'    => $cnum);
-           map {
-               my ($name,$value)=split(/\=/,$_);
-               $name=&unescape($name);
-               $value=&unescape($value);
-               $returnhash{$name}=$value;
+           $returnhash{'home'}= $chome;
+	   $returnhash{'domain'} = $cdomain;
+	   $returnhash{'num'} = $cnum;
+           while (my ($name,$value) = each %returnhash) {
                $envhash{'course.'.$normalid.'.'.$name}=$value;
-           } split(/\&/,$rep);
+           }
            $returnhash{'url'}='/res/'.declutter($returnhash{'url'});
            $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
 	       $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
@@ -830,8 +892,12 @@ sub rolesinit {
             }
           } 
         } split(/&/,$rolesdump);
+        my $adv=0;
+        my $author=0;
         map {
             %thesepriv=();
+            if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
+            if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
             map {
                 if ($_ ne '') {
 		    my ($privilege,$restrictions)=split(/&/,$_);
@@ -848,6 +914,9 @@ sub rolesinit {
             map { $thesestr.=':'.$_.'&'.$thesepriv{$_}; } keys %thesepriv;
             $userroles.='user.priv.'.$_.'='.$thesestr."\n";
         } keys %allroles;            
+        $userroles.='user.adv='.$adv."\n".
+	            'user.author='.$author."\n";
+        $ENV{'user.adv'}=$adv;
     }
     return $userroles;  
 }
@@ -855,43 +924,51 @@ sub rolesinit {
 # --------------------------------------------------------------- get interface
 
 sub get {
-   my ($namespace,@storearr)=@_;
+   my ($namespace,$storearr,$udomain,$uname)=@_;
    my $items='';
    map {
        $items.=escape($_).'&';
-   } @storearr;
+   } @$storearr;
    $items=~s/\&$//;
- my $rep=reply("get:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
-                 $ENV{'user.home'});
+   if (!$udomain) { $udomain=$ENV{'user.domain'}; }
+   if (!$uname) { $uname=$ENV{'user.name'}; }
+   my $uhome=&homeserver($uname,$udomain);
+
+   my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
    my @pairs=split(/\&/,$rep);
    my %returnhash=();
    my $i=0;
    map {
       $returnhash{$_}=unescape($pairs[$i]);
       $i++;
-   } @storearr;
+   } @$storearr;
    return %returnhash;
 }
 
 # --------------------------------------------------------------- del interface
 
 sub del {
-   my ($namespace,@storearr)=@_;
+   my ($namespace,$storearr,$udomain,$uname)=@_;
    my $items='';
    map {
        $items.=escape($_).'&';
-   } @storearr;
+   } @$storearr;
    $items=~s/\&$//;
-   return reply("del:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
-                 $ENV{'user.home'});
+   if (!$udomain) { $udomain=$ENV{'user.domain'}; }
+   if (!$uname) { $uname=$ENV{'user.name'}; }
+   my $uhome=&homeserver($uname,$udomain);
+
+   return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
 }
 
 # -------------------------------------------------------------- dump interface
 
 sub dump {
-   my $namespace=shift;
-   my $rep=reply("dump:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace",
-                $ENV{'user.home'});
+   my ($namespace,$udomain,$uname)=@_;
+   if (!$udomain) { $udomain=$ENV{'user.domain'}; }
+   if (!$uname) { $uname=$ENV{'user.name'}; }
+   my $uhome=&homeserver($uname,$udomain);
+   my $rep=reply("dump:$udomain:$uname:$namespace",$uhome);
    my @pairs=split(/\&/,$rep);
    my %returnhash=();
    map {
@@ -904,48 +981,53 @@ sub dump {
 # --------------------------------------------------------------- put interface
 
 sub put {
-   my ($namespace,%storehash)=@_;
+   my ($namespace,$storehash,$udomain,$uname)=@_;
+   if (!$udomain) { $udomain=$ENV{'user.domain'}; }
+   if (!$uname) { $uname=$ENV{'user.name'}; }
+   my $uhome=&homeserver($uname,$udomain);
    my $items='';
    map {
-       $items.=escape($_).'='.escape($storehash{$_}).'&';
-   } keys %storehash;
+       $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
+   } keys %$storehash;
    $items=~s/\&$//;
-   return reply("put:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
-                 $ENV{'user.home'});
+   return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
 }
 
 # ------------------------------------------------------ critical put interface
 
 sub cput {
-   my ($namespace,%storehash)=@_;
+   my ($namespace,$storehash,$udomain,$uname)=@_;
+   if (!$udomain) { $udomain=$ENV{'user.domain'}; }
+   if (!$uname) { $uname=$ENV{'user.name'}; }
+   my $uhome=&homeserver($uname,$udomain);
    my $items='';
    map {
-       $items.=escape($_).'='.escape($storehash{$_}).'&';
-   } keys %storehash;
+       $items.=escape($_).'='.escape($$storehash{$_}).'&';
+   } keys %$storehash;
    $items=~s/\&$//;
-   return critical
-           ("put:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
-                 $ENV{'user.home'});
+   return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
 }
 
 # -------------------------------------------------------------- eget interface
 
 sub eget {
-   my ($namespace,@storearr)=@_;
+   my ($namespace,$storearr,$udomain,$uname)=@_;
    my $items='';
    map {
        $items.=escape($_).'&';
-   } @storearr;
+   } @$storearr;
    $items=~s/\&$//;
- my $rep=reply("eget:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
-                 $ENV{'user.home'});
+   if (!$udomain) { $udomain=$ENV{'user.domain'}; }
+   if (!$uname) { $uname=$ENV{'user.name'}; }
+   my $uhome=&homeserver($uname,$udomain);
+   my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
    my @pairs=split(/\&/,$rep);
    my %returnhash=();
    my $i=0;
    map {
       $returnhash{$_}=unescape($pairs[$i]);
       $i++;
-   } @storearr;
+   } @$storearr;
    return %returnhash;
 }
 
@@ -1224,8 +1306,22 @@ sub definerole {
 # ---------------- Make a metadata query against the network of library servers
 
 sub metadata_query {
-    my ($query)=@_;
-    my $reply=&reply("querysend:".&escape($query),'msul3');
+    my ($query,$custom,$customshow)=@_;
+    # need to put in a library server loop here and return a hash
+    my %rhash;
+    for my $server (keys %libserv) {
+	unless ($custom or $customshow) {
+	    my $reply=&reply("querysend:".&escape($query),$server);
+	    $rhash{$server}=$reply;
+	}
+	else {
+	    my $reply=&reply("querysend:".&escape($query).':'.
+			     &escape($custom).':'.&escape($customshow),
+			     $server);
+	    $rhash{$server}=$reply;
+	}
+    }
+    return \%rhash;
 }
 
 # ------------------------------------------------------------------ Plain Text
@@ -1340,27 +1436,20 @@ sub modifyuser {
        }
     }
 # -------------------------------------------------------------- Add names, etc
-    my $names=&reply('get:'.$udom.':'.$uname.
-                     ':environment:firstname&middlename&lastname&generation',
-                     $uhome);
-    my ($efirst,$emiddle,$elast,$egene)=split(/\&/,$names);
-    if ($first)  { $efirst  = &escape($first); }
-    if ($middle) { $emiddle = &escape($middle); }
-    if ($last)   { $elast   = &escape($last); }
-    if ($gene)   { $egene   = &escape($gene); }
-    my $reply=&reply('put:'.$udom.':'.$uname.
-           ':environment:firstname='.$efirst.
-                      '&middlename='.$emiddle.
-                        '&lastname='.$elast.
-                      '&generation='.$egene,$uhome);
-    if ($reply ne 'ok') {
-	return 'error: '.$reply;
-    }
+    my %names=&get('environment',
+		   ['firstname','middlename','lastname','generation'],
+		   $udom,$uname);
+    if ($first)  { $names{'firstname'}  = $first; }
+    if ($middle) { $names{'middlename'} = $middle; }
+    if ($last)   { $names{'lastname'}   = $last; }
+    if ($gene)   { $names{'generation'} = $gene; }
+    my $reply = &put('environment', \%names, $udom,$uname);
+    if ($reply ne 'ok') { return 'error: '.$reply; }
     &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
              $umode.', '.$first.', '.$middle.', '.
 	     $last.', '.$gene.' by '.
              $ENV{'user.name'}.' at '.$ENV{'user.domain'});
-    return 'ok'; 
+    return 'ok';
 }
 
 # -------------------------------------------------------------- Modify student
@@ -1585,7 +1674,7 @@ sub condval {
 # --------------------------------------------------------- Value of a Variable
 
 sub EXT {
-    my $varname=shift;
+    my ($varname,$symbparm)=@_;
     unless ($varname) { return ''; }
     my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
     my $rest;
@@ -1601,7 +1690,7 @@ sub EXT {
     if ($realm eq 'user') {
 # --------------------------------------------------------------- user.resource
 	if ($space eq 'resource') {
-	    my %restored=&restore;
+	    my %restored=&restore();
             return $restored{$qualifierrest};
 # ----------------------------------------------------------------- user.access
         } elsif ($space eq 'access') {
@@ -1629,7 +1718,7 @@ sub EXT {
 # ---------------------------------------------------- Any other user namespace
         } else {
             my $item=($rest)?$qualifier.'.'.$rest:$qualifier;
-            my %reply=&get($space,$item);
+            my %reply=&get($space,[$item]);
             return $reply{$item};
         }
     } elsif ($realm eq 'request') {
@@ -1642,49 +1731,54 @@ sub EXT {
         }
     } elsif ($realm eq 'course') {
 # ---------------------------------------------------------- course.description
-        my $section='';
-        if ($ENV{'request.course.sec'}) {
-	    $section='_'.$ENV{'request.course.sec'};
-        }
-        return $ENV{'course.'.$ENV{'request.course.id'}.$section.'.'.
+        return $ENV{'course.'.$ENV{'request.course.id'}.'.'.
                               $spacequalifierrest};
     } elsif ($realm eq 'resource') {
-      if ($ENV{'request.course.id'}) {
+       if ($ENV{'request.course.id'}) {
+
+#	   print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
+
+
 # ----------------------------------------------------- Cascading lookup scheme
-       my $symbp=&symbread();
-       my $mapp=(split(/\_\_\_/,$symbp))[0];
+         my $symbp;
+         if ($symbparm) {
+            $symbp=$symbparm;
+	 } else {
+            $symbp=&symbread();
+         }            
+         my $mapp=(split(/\_\_\_/,$symbp))[0];
 
-       my $symbparm=$symbp.'.'.$spacequalifierrest;
-       my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
+         my $symbparm=$symbp.'.'.$spacequalifierrest;
+         my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
 
-       my $seclevel=
+         my $seclevel=
             $ENV{'request.course.id'}.'.['.
 		$ENV{'request.course.sec'}.'].'.$spacequalifierrest;
-       my $seclevelr=
+         my $seclevelr=
             $ENV{'request.course.id'}.'.['.
 		$ENV{'request.course.sec'}.'].'.$symbparm;
-       my $seclevelm=
+         my $seclevelm=
             $ENV{'request.course.id'}.'.['.
 		$ENV{'request.course.sec'}.'].'.$mapparm;
 
-       my $courselevel=
+         my $courselevel=
             $ENV{'request.course.id'}.'.'.$spacequalifierrest;
-       my $courselevelr=
+         my $courselevelr=
             $ENV{'request.course.id'}.'.'.$symbparm;
-       my $courselevelm=
+         my $courselevelm=
             $ENV{'request.course.id'}.'.'.$mapparm;
 
 # ----------------------------------------------------------- first, check user
-      my %resourcedata=get('resourcedata',
-                           ($courselevelr,$courselevelm,$courselevel));
-      if (($resourcedata{$courselevelr}!~/^error\:/) &&
-          ($resourcedata{$courselevelr}!~/^con_lost/)) {
-
-       if ($resourcedata{$courselevelr}) { 
-          return $resourcedata{$courselevelr}; }
-       if ($resourcedata{$courselevelm}) { 
-          return $resourcedata{$courselevelm}; }
-       if ($resourcedata{$courselevel}) { return $resourcedata{$courselevel}; }
+         my %resourcedata=get('resourcedata',
+                           [$courselevelr,$courselevelm,$courselevel]);
+         if (($resourcedata{$courselevelr}!~/^error\:/) &&
+             ($resourcedata{$courselevelr}!~/^con_lost/)) {
+
+         if ($resourcedata{$courselevelr}) { 
+            return $resourcedata{$courselevelr}; }
+         if ($resourcedata{$courselevelm}) { 
+            return $resourcedata{$courselevelm}; }
+         if ($resourcedata{$courselevel}) { return $resourcedata{$courselevel}; }
 
       } else {
 	  if ($resourcedata{$courselevelr}!~/No such file/) {
@@ -1739,10 +1833,25 @@ sub EXT {
                                          'parameter_'.$spacequalifierrest);
       if ($metadata) { return $metadata; }
 
+# ------------------------------------------------------------------ Cascade up
+
+      unless ($space eq '0') {
+          my ($part,$id)=split(/\_/,$space);
+          if ($id) {
+	      my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
+                                   $symbparm);
+              if ($partgeneral) { return $partgeneral; }
+          } else {
+              my $resourcegeneral=&EXT('resource.0.'.$qualifierrest,
+                                       $symbparm);
+              if ($resourcegeneral) { return $resourcegeneral; }
+          }
+      }
+
 # ---------------------------------------------------- Any other user namespace
     } elsif ($realm eq 'environment') {
 # ----------------------------------------------------------------- environment
-        return $ENV{$spacequalifierrest};
+        return $ENV{'environment.'.$spacequalifierrest};
     } elsif ($realm eq 'system') {
 # ----------------------------------------------------------------- system.time
 	if ($space eq 'time') {
@@ -1761,25 +1870,59 @@ sub metadata {
     my $filename=$uri;
     $uri=~s/\.meta$//;
     unless ($metacache{$uri.':keys'}) {
+        my %metathesekeys=();
         unless ($filename=~/\.meta$/) { $filename.='.meta'; }
 	my $metastring=&getfile($perlvar{'lonDocRoot'}.'/res/'.$filename);
         my $parser=HTML::TokeParser->new(\$metastring);
         my $token;
+        undef %metathesekeys;
         while ($token=$parser->get_token) {
            if ($token->[0] eq 'S') {
+	     if (defined($token->[2]->{'package'})) {
+	      my $package=$token->[2]->{'package'};
+	      my $keyroot='';
+              if (defined($token->[2]->{'part'})) { 
+                 $keyroot.='_'.$token->[2]->{'part'}; 
+	      }
+              if (defined($token->[2]->{'id'})) { 
+                 $keyroot.='_'.$token->[2]->{'id'}; 
+	      }
+              if ($metacache{$uri.':packages'}) {
+                 $metacache{$uri.':packages'}.=','.$package.$keyroot;
+              } else {
+                 $metacache{$uri.':packages'}=$package.$keyroot;
+	      }
+              map {
+		  if ($_=~/^$package\&/) {
+		      my ($pack,$name,$subp)=split(/\&/,$_);
+                      my $value=$packagetab{$_};
+		      my $part=$keyroot;
+                      $part=~s/^\_//;
+                      if ($subp eq 'display') {
+			  $value.=' [Part: '.$part.']';
+                      }
+                      my $unikey='parameter'.$keyroot.'_'.$name;
+                      $metathesekeys{$unikey}=1;
+                      $metacache{$uri.':'.$unikey.'.part'}=$part;
+                      unless 
+                       (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
+                         $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
+		      }
+                  }
+              } keys %packagetab;
+             } else {
 	      my $entry=$token->[1];
               my $unikey=$entry;
               if (defined($token->[2]->{'part'})) { 
                  $unikey.='_'.$token->[2]->{'part'}; 
 	      }
+              if (defined($token->[2]->{'id'})) { 
+                 $unikey.='_'.$token->[2]->{'id'}; 
+	      }
               if (defined($token->[2]->{'name'})) { 
                  $unikey.='_'.$token->[2]->{'name'}; 
 	      }
-              if ($metacache{$uri.':keys'}) {
-                 $metacache{$uri.':keys'}.=','.$unikey;
-              } else {
-                 $metacache{$uri.':keys'}=$unikey;
-	      }
+              $metathesekeys{$unikey}=1;
               map {
 		  $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
               } @{$token->[3]};
@@ -1788,8 +1931,10 @@ sub metadata {
 		      ) { $metacache{$uri.':'.$unikey}=
 			      $metacache{$uri.':'.$unikey.'.default'};
 		      }
-          }
+	    }
+	 }
        }
+       $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
     }
     return $metacache{$uri.':'.$what};
 }
@@ -2070,6 +2215,21 @@ if ($readit ne 'done') {
     }
 }
 
+# ---------------------------------------------------------- Read package table
+{
+    my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
+
+    while (my $configline=<$config>) {
+       chomp($configline);
+       my ($short,$plain)=split(/:/,$configline);
+       my ($pack,$name)=split(/\&/,$short);
+       if ($plain ne '') {
+          $packagetab{$pack.'&'.$name.'&name'}=$name; 
+          $packagetab{$short}=$plain; 
+       }
+    }
+}
+
 # ------------------------------------------------------------- Read file types
 {
     my $config=Apache::File->new("$perlvar{'lonTabDir'}/filetypes.tab");