I read following document about expressing a search domain (args) for xml-rpc:
https://doc.openerp.com/trunk/server/api_models/
Where it's explained how to write the following query:
(name is 'ABC' AND (language is NOT english) AND (country is Belgium OR Germany))
To get:
[('name','=','ABC'),'!',('language.code','=','en_US'),'|',('country_id.code','=','be'),('country_id.code','=','de'))
The arity of the '&' and '|' operator is 2, so how can I wrote the following query:
(name is 'ABC' AND (language is NOT english) AND (country is Belgium OR Germany OR France OR Italy))