| 摘要 |
An application messaging sytem (AMS) (Fig.3) is provided as a means to simplify access to and modification of a server application located on a server by a client application in a client/server computer environment. The AMS comprises a client end application interface (Fig.2) which operates between the client application and the client/server environment to generate predetermined requests. The AMS also comprises a server end application interface to operate between the client/server environment and the server application to receive the requests. A further element of the AMS is a Business Function module in the server end application interface which translates the received request into generic data identifiers. Those data identifiers operate the server application and also receive the results of the request and pass them in a predetermined format to the client end application interface for presentation to the user as result data. The AMS can be arranged as a first Client/Server database access mechanism which may itself access (Fig.2), via a further AMS, a second Client/Server database access mechanism, and so on as required. The AMS may also be used to control and access a Programmable Logic Controller in a process control environment. The AMS is modular and easily developed, modified and added to without affecting its functionality or ability to work with older versions of requests and replies.
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