I am not sure if this is development or document but I am trying to get my head around hooks<br><br><a href="http://drupal.org/node/55243">http://drupal.org/node/55243</a><br><br>There does not seem to be any explaination of the differences and when to use 
<br><br>system hooks<br>module hooks<br>node hooks<br><br>Some type of example or chart would be appreciated also.<br><br>Thanks<br>