diff --git a/python/obitools3/dms/column/column.pyx b/python/obitools3/dms/column/column.pyx
index f060ea4..43c5f99 100644
--- a/python/obitools3/dms/column/column.pyx
+++ b/python/obitools3/dms/column/column.pyx
@@ -63,24 +63,25 @@ cdef class Column(OBIWrapper) :
                    object    column_name,
                    obitype_t data_type,
                    index_t   nb_elements_per_line=1,
-                   object    elements_names=None,
-                   object    comments=b""):
-                             
+                   list      elements_names=None,
+                   object    comments=b"",
+                   object    alias=b""):
+        # TODO indexer_name?
+        
         cdef bytes column_name_b = tobytes(column_name)
-        cdef bytes comments_b
+        cdef bytes alias_b = tobytes(alias)
+        cdef bytes comments_b = tobytes(comments)
         cdef bytes elements_names_b
         cdef char* elements_names_p
         
         if not view.active() :
             raise OBIObjectClosedInstance()
-        
-        if comments is not None:
-            comments_b  = tobytes(comments)
-        else:
-            comments_b  = b''
+ 
+        if alias_b == b"" :
+            alias_b = column_name_b
  
         if elements_names is not None:
-            elements_names_b = b''.join([tobytes(x) for x in elements_names])
+            elements_names_b = b';'.join([tobytes(x) for x in elements_names])
             elements_names_p = elements_names_b
         else:
             elements_names_p = NULL
@@ -88,7 +89,7 @@ cdef class Column(OBIWrapper) :
         if (obi_view_add_column(view                      = view.pointer(),
                                 column_name               = column_name_b,
                                 version_number            = -1,
-                                alias                     = NULL,
+                                alias                     = alias_b,
                                 data_type                 = <obitype_t>data_type,
                                 nb_lines                  = len(view),
                                 nb_elements_per_line      = nb_elements_per_line,
@@ -100,8 +101,8 @@ cdef class Column(OBIWrapper) :
                                 create                    = True)<0):
             raise RuntimeError("Cannot create column %s in view %s" % (bytes2str(column_name_b),
                                                                        bytes2str(view.name)))
-         
-        return Column.open(view, column_name)
+                
+        return Column.open(view, alias_b)
  
  
     @staticmethod
@@ -125,18 +126,19 @@ cdef class Column(OBIWrapper) :
                     bytes2str(column_name_b),
                     bytes2str(view.name)
                 ))
-             
+        
         column_p = column_pp[0]
         column_type = column_p.header.returned_data_type 
         column_class = Column.get_column_class(column_type, (column_p.header.nb_elements_per_line > 1))
         column = OBIWrapper.new(column_class, column_pp)
+        
         column._view = view
         column._alias = column_name_b
         view.register(column)
-                
-        return column 
- 
-    
+
+        return column
+
+
     def add_to_view(self,
                     View view,
                     object column_name=None) :
@@ -240,7 +242,7 @@ cdef class Column(OBIWrapper) :
         return self._alias
     @name.setter
     def name(self, new_alias):  # @DuplicatedSignature
-        self._view.change_column_alias(self._alias, new_alias)
+        self._view.rename_column(self._alias, new_alias)
  
     # elements_names property getter
     @property