--- a/doc/book/en/development/devrepo/hooks.rst	Mon Apr 12 16:49:35 2010 +0200
+++ b/doc/book/en/development/devrepo/hooks.rst	Mon Apr 12 16:57:11 2010 +0200
@@ -41,7 +41,7 @@
 
 * implement computed attributes
 
-Operations are Hook-like objects that are created by Hooks and
+Operations are Hook-like objects that maye be created by Hooks and
 scheduled to happen just before (or after) the `commit` event. Hooks
 being fired immediately on data operations, it is sometime necessary
 to delay the actual work down to a time where all other Hooks have
@@ -50,6 +50,10 @@
 is data dependant (and thus hard to predict), it is possible to force
 an order on Operations.
 
+Operations also may be used to process various side effects associated
+with a transaction such as filesystem udpates, mail notifications,
+etc.
+
 Operations are subclasses of the Operation class in `server/hook.py`,
 implementing `precommit_event` and other standard methods (wholly
 described later in this chapter).