What should be an ideal electronic document management system?

As all of us know, lately the concept "electronic document management" significantly increased "coverage" and now extends to the most different areas concerning corporate content management (Enterprise Content Management, ECM) and the business processes connected with it. At the same time often customers, saying that they need that "electronic document management", mean the most different functional applications. With respect thereto, TAdviser and Business Logic company decided to define more precisely what document flow is demanded in our market what functionality is not enough for you (or you do not accept its current implementation in a system which you use).