diff --git a/protocol/specification/accessibles.rst b/protocol/specification/accessibles.rst
index b0c4676a..7d6c091b 100644
--- a/protocol/specification/accessibles.rst
+++ b/protocol/specification/accessibles.rst
@@ -407,15 +407,28 @@ or by a single ``<parameter_name>_limits`` parameter.
     | :issue:`077 predefined parameter name prefixes` 
 
 
-Feature related parameters
-~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-.. _offset:
+Offset
+~~~~~~
 
 .. parameter:: offset
 
-    A storage for an offset to be applied when converting SECoP values to ECS
-    values.  See feature `HasOffset`.
+    If this parameter is present it indicates the difference between a raw value
+    and the main value of a SECoP module. If this parameter is not readonly,
+    it allows to adjust the parameter ``value`` and possibly other parameters
+    related to it, like ``target``.
+
+    Definition:
+
+    | ``offset`` = raw value - ``value``
+
+
+    When a SEC node receives a ``change`` message for an ``offset``, an activated
+    client must receive the ``update`` message for the ``value`` before the 
+   ``changed`` message is replied to the client.
+
+    Whether other parameters like ``target_min``, ``target_max`` or ``target_limits``
+    are also changed accordingly is implementation dependent. When they are changed,
+    this also must happen before the ``changed`` message is sent back.
 
 
 Communication
diff --git a/protocol/specification/classes.rst b/protocol/specification/classes.rst
index a25f4441..5a06bd6b 100644
--- a/protocol/specification/classes.rst
+++ b/protocol/specification/classes.rst
@@ -190,22 +190,4 @@ and/or module properties to be present.  However, it is not only a list of
 mandatory or optional elements, but also indicates to the ECS that it may handle
 this functionality in a specific way.
 
-.. feature:: HasOffset
-
-    This feature indicates that the `value` and `target` parameters of a
-    module represent raw values, which need to be corrected by an offset.  A
-    module with the feature `HasOffset` must have a parameter `offset`,
-    which indicates to all clients that the transmitted raw values for the
-    parameters `value` and `target` are to be converted to corrected values
-    (on the client side) by the following formulas:
-
-    For reading the parameters `value` and `target`:
-
-    | corrected value (client) = value (transmitted) + offset
-    | corrected target (client) = target (transmitted) + offset
-
-    For changing the parameter `target`:
-
-    | target (transmitted) = corrected target (client) - offset
-
-    Mandatory parameter: `offset`
+Currently no features are specified yet.