Switching from 6.5 to 6.6
+++++++++++++++++++++++++
-There is no known incompatibility for the ADAO case file or the accompanying
-scripts. The upgrade procedure is to read the old ADAO case file with the new
-SALOME/ADAO module, and save it with a new name.
+There is no known incompatibility for the ADAO case file. The upgrade procedure
+is to read the old ADAO case file with the new SALOME/ADAO module, and save it
+with a new name.
+
+There is one incompatibility introduced for the designation of operators used to
+for the observation operator. The new mandatory names are "*DirectOperator*",
+"*TangentOperator*" and "*AdjointOperator*", as described in the last subsection
+of the chapter :ref:`section_reference`.
Switching from 6.4 to 6.5
+++++++++++++++++++++++++
approximation to build the tangent and adjoint operators.
This first operator definition allow easily to test the functional form before
-its use in an ADAO case, reducing the complexity of implementation.
+its use in an ADAO case, greatly reducing the complexity of implementation.
+
+**Important warning:** the name "*DirectOperator*" is mandatory, and the type of
+the X argument can be either a python list, a numpy array or a numpy 1D-matrix.
+The user has to treat these cases in his script.
Second functional form: using "*ScriptWithFunctions*"
+++++++++++++++++++++++++++++++++++++++++++++++++++++
...
return something like X
-Another time, this second perator definition allow easily to test the functional
-forms before their use in an ADAO case, greatly reducing the complexity of
+Another time, this second operator definition allow easily to test the
+functional forms before their use in an ADAO case, reducing the complexity of
implementation.
+**Important warning:** the names "*DirectOperator*", "*TangentOperator*" and
+"*AdjointOperator*" are mandatory, and the type of the X, Y, dX arguments can be
+either a python list, a numpy array or a numpy 1D-matrix. The user has to treat
+these cases in his script.
+
Third functional form: using "*ScriptWithSwitch*"
+++++++++++++++++++++++++++++++++++++++++++++++++