What is the best way to make importation/exportation from external system to openerp and vice versa. Some data need to be imported from openerp to external system, and some data from that same external system to openerp. That external system, I was said is not sql database type (didn't get any more info about that). But only text files (csv I suppose), are needed to make import/export. So what would the best way to make mapping of systems? Some kind of module where you could mark that one field from that system equals to openerp's field etc? Any information about that would be appreciated.