--- a/doc/book/en/B0031-define-entities.en.txt	Mon Dec 29 11:16:49 2008 -0800
+++ b/doc/book/en/B0031-define-entities.en.txt	Mon Dec 29 13:50:42 2008 -0800
@@ -69,7 +69,7 @@
 * `generated`, indicates that an attribute is dynamically computed
   or other,  and that it should not be displayed in the editing form.
 
-If necessarry, it is possible to overwrite the method  
+If necessary, it is possible to overwrite the method  
 `relation_category(rtype, x='subject')` to dynamically compute
 a relation editing category.
 
@@ -92,7 +92,7 @@
   entity and link to it automatically
 
 
-If necessarry, it is possible to overwrite the method  
+If necessary, it is possible to overwrite the method  
 `relation_mode(rtype, targettype, x='subject')` to dynamically
 compute a relation creation category.