diff --git a/ListsProtocol.wiki b/ListsProtocol.wiki
index 65b0cc9..a3b8bb0 100644
--- a/ListsProtocol.wiki
+++ b/ListsProtocol.wiki
@@ -127,6 +127,17 @@
         "keys": ["key","link_id"],
         "refresh": "table"
       }
+    },
+    {
+      "bounds": [0,"all"],
+      "id": "diff",
+      "caption": "Diff between revisions",
+      "type": "post",
+      "parameters": {
+        "url": "/something",
+        "keys": ["key","link_id"],
+        "redirect": "true"
+      }
     }
   ],
   "row" : {
@@ -149,7 +160,13 @@
 Following a list of methods allowed for buttons:
   # *redirect_simple*: this type of behaviour is normally used when the button should be static and should always redirect to the same url (e.g. "Add user"). Parameters accepted are of the following types: {{{"link": "http://whatever"}}} (that is, a *string* with the url the button should redirect to) and {{{"new_window": true}}} (that is, a *boolean* which define whether the redirected page should be shown in a new window or not).
   # *redirect_custom*: this type of behaviour is used when the button should dinamically change the link where the user should be redirected depending on which row is chosen (e.g. "Edit user") (see _data/operations/buttons/link_ and _data/operations/buttons/caption_). Only parameter accepted is {{{"new_window": true}}} (that is, a *boolean* which define whether the redirected page should be shown in a new window or not).
-  # *post*: this type of behaviour is used when the button should send something to the backend (e.g. a list of entities to delete). Parameters accepted are of following types: {{{"url": "http://whatever"}}} (that is, a *string* with the url the button should send data to the backend), {{{"keys": ["key","link_id"]}}} (that is, an *array of strings*: each string should be one of the _name_ key in the _colModel_ array, see _configuration/colModel_ and those will define which data should be sent back, using an array of objects, to the backend for each entity selected client side), {{{"refresh": "table"}}} is a *string* which determines whether the table should be refreshed or not: at the moment only "table" option is allowed, support for single "row" refreshing will be made some time in the future.
+  # *post*: this type of behaviour is used when the button should send something to the backend (e.g. a list of entities to delete). Parameters accepted are of following types: {{{"url": "http://whatever"}}} (that is, a *string* with the url the button should send data to the backend), {{{"keys": ["key","link_id"]}}} (that is, an *array of strings*: each string should be one of the _name_ key in the _colModel_ array, see _configuration/colModel_ and those will define which data should be sent back, using an array of objects, to the backend for each entity selected client side), {{{"refresh": "table"}}} is a *string* which determines whether the table should be refreshed or not: at the moment only "table" option is allowed, support for single "row" refreshing will be made some time in the future. {{{"redirect": "true"}}} means that the server wants the client to be redirected to another page after sending data to the server, and the URL is not known at the moment of the creation of the configuration. The client will send the data requested and expect a JSON like this:
+
+{{{
+ "data": {
+   "url": "http://new_url_to_redirect_to"
+ }
+}}}
 
 === *row* ===
 Row actions are allowed only if no {{{multiselect: true}}} is found in the _configuration_ object. Only *redirect_custom* method is allowed, with the same options as for _operations/buttons_. Details to define the url of each row in _data/operations/row_ details.