Comments should make the difference between object and content clearer

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@10506 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/Accessor/TypeDefinition.py

@@ -142,11 +142,14 @@ type_definition = {
                              'default' : [],
                              'isList'  : 1,
                            },
+                           # Content are subdocuments (ex. default_career)
     'content'             : { 'cast'    : identity,          
                              'null'    : ('', 'None', None,),
                              'default' : None,
                              'isList'  : 0,
                            },
+                           # Object are properties of any type (ex. data)
+                           # and are considered as simple properties
     'object'             : { 'cast'    : identity, 
                              'null'    : ('', 'None', None,),
                              'default' : None,