--- loncom/interface/lonnavmaps.pm	2010/03/29 17:55:55	1.447
+++ loncom/interface/lonnavmaps.pm	2010/06/16 23:42:55	1.448
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Navigate Maps Handler
 #
-# $Id: lonnavmaps.pm,v 1.447 2010/03/29 17:55:55 raeburn Exp $
+# $Id: lonnavmaps.pm,v 1.448 2010/06/16 23:42:55 raeburn Exp $
 
 #
 # Copyright Michigan State University Board of Trustees
@@ -2304,7 +2304,7 @@ resource object.
 Based on the symb of the resource, get a resource object for that
 resource. This is one of the proper ways to get a resource object.
 
-=item * B<getMapByMapPc>(map_pc):
+=item * B<getByMapPc>(map_pc):
 
 Based on the map_pc of the resource, get a resource object for
 the given map. This is one of the proper ways to get a resource object.
@@ -2574,7 +2574,7 @@ in the filter function.
 Retrieves version infomation for a url. Returns the version (a number, or 
 the string "mostrecent") for resources which have version information in  
 the big hash.
-    
+
 =cut
 
 
@@ -3840,6 +3840,12 @@ resource of the map.
 
 Returns a string with the type of the map in it.
 
+=item *B<map_hierarchy>:
+
+Returns a string with a comma-separated ordered list of map_pc IDs
+for the hierarchy of maps containing a map, with the top level
+map first, then descending to deeper levels, with the enclosing map last.
+
 =back
 
 =cut
@@ -3870,6 +3876,11 @@ sub map_type {
     my $pc = $self->map_pc();
     return $self->navHash("map_type_$pc", 0);
 }
+sub map_hierarchy {
+    my $self = shift;
+    my $pc = $self->map_pc();
+    return $self->navHash("map_hierarchy_$pc", 0);
+}
 
 #####
 # Property queries