| With the development of information technology, OAS plays a more and more important role in institution's daily work. OAS is expected to satisfy constantly changing work demands and realize the information interchange and sharing as far as to scientific management and decision making.This paper introduces what is OA and it's internal development and the background of constructing Dalian Maritime University OAS. The paper analyzes OAS's general demand for functions, such as E-mail, realizing workflow automatization and so on. Countering the function characteristics of OAS, the paper analyzes it's demand for the development platform. Through comparing kinds of existing OAS development platform, it brings forward that Lotus Notes is the best groupware platform to develop OAS. Following it, Lotus Notes is simply presented .Through analyzing the function demands of Dlmu OAS, the paper establishes the system target and puts forward system implementation plan of adopting B/S structure. Lotus Domino/Notes R5 is used as the system main body to realize not only the workflow automatization but also the maintenance and automatization management of various document information. It integrates the OAS and operation system effectively by accessing relation database through ODBC. By adding Web programming on the server, browser can be used to visit information. Dlmu OAS has implemented such functions as E-mail, management of receiving and sending document, session management, callboard and so on. In the developing process, following problems has been resolved: realizing the system's security administration, allowing standard browsers to access Notes database, implementing workflow automatization and data access to relation database .The paper puts up expectation in the end. It explains the conception of 3rd generation OA system which is based on knowledgement management, and introduces the structure frame of 3rd generation OAS put forward by Lotus company.
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