diff --git a/product/ERP5/Document/SolverDecision.py b/product/ERP5/Document/SolverDecision.py
index b3f73d3970134154784f4595e233902a711c08bb..88a22e13d9f086747be7425baaa57a421d60cdc4 100644
--- a/product/ERP5/Document/SolverDecision.py
+++ b/product/ERP5/Document/SolverDecision.py
@@ -78,7 +78,6 @@ class SolverDecision(XMLObject):
                     , PropertySheet.SolverSelection
                     )
   # XXX-JPS missing property sheet or categories to specify 
-  #   delivery -> the delivery lines which are solved by the decision
   #   (default)delivery or solver_application or order -> the object of application of resolution
   #         ie. a specified delivery, a specified delivery line, etc.
   #         (delivery should be enough)
diff --git a/product/ERP5/PropertySheet/SolverSelection.py b/product/ERP5/PropertySheet/SolverSelection.py
index c1d8296c3452e6c0adae5403a529c02dac9d9334..e5889525fa6bdb97b7ce56348068659622e1dafa 100644
--- a/product/ERP5/PropertySheet/SolverSelection.py
+++ b/product/ERP5/PropertySheet/SolverSelection.py
@@ -40,4 +40,4 @@ class SolverSelection:
     
   )
 
-  _categories = ('solver',)
+  _categories = ('causality', 'delivery', 'solver',)