diff --git a/mozilla/modules/rdf/include/vocab.h b/mozilla/modules/rdf/include/vocab.h
index f58fa86a1a7..65f1c08d4ed 100644
--- a/mozilla/modules/rdf/include/vocab.h
+++ b/mozilla/modules/rdf/include/vocab.h
@@ -152,6 +152,14 @@ typedef struct _RDF_NCVocabStruct {
   RDF_Resource showColumnHilite;
   RDF_Resource triggerPlacement;
 
+  /* NavCenter behavior flags */
+  
+  RDF_Resource useInlineEditing;
+  RDF_Resource useSingleClick;
+  RDF_Resource useSelection;	/* also marquee selection, drag and drop, context menus */
+  RDF_Resource loadOpenState;
+  RDF_Resource saveOpenState;
+  
   /* Toolbar Appearance Styles */
   RDF_Resource toolbarBitmapPosition; /* Bitmap's position ("side"/"top") */
 
diff --git a/mozilla/modules/rdf/src/vocab.c b/mozilla/modules/rdf/src/vocab.c
index b74039c05ed..6e6c4def73f 100644
--- a/mozilla/modules/rdf/src/vocab.c
+++ b/mozilla/modules/rdf/src/vocab.c
@@ -227,6 +227,13 @@ createNavCenterVocab () {
   gNavCenter->showColumnHilite = newResource("showColumnHilite", RDF_SHOW_COLUMN_HILITING_STR);
   gNavCenter->triggerPlacement = newResource("triggerPlacement", RDF_TRIGGER_PLACEMENT_STR);
 
+  /* NavCenter behavior properties */
+  gNavCenter->useInlineEditing = newResource("useInlineEditing", 0 /* XXX */);
+  gNavCenter->useSingleClick = newResource("useSingleClick", 0 /* XXX */);
+  gNavCenter->useSelection = newResource("useSelection", 0 /* XXX */);
+  gNavCenter->loadOpenState = newResource("loadOpenState", 0 /* XXX */);
+  gNavCenter->saveOpenState = newResource("saveOpenState", 0 /* XXX */);
+ 
   /* Toolbars */
 
   /* Toolbar Appearance Styles */