Flanagan J R, Chun J, Wagner J R
Department of Internal Medicine, University of Iowa, Iowa City 52242, USA.
Proc AMIA Annu Fall Symp. 1996:618-22.
A layered system is under development to enhance our legacy system as a backend in a WEB-enabled system. Each layer of the system has defined functionality, leverages the investment in the layer below, and follows the strategy of reducing support requirements for workstations. The mainframe system provides administrative integration of sub-systems, security, and the central data repository for most information. The second layer is a graphical user interface (GUI) to the system for Windows platforms. Support needs are limited by relying chiefly on X-terminals and application servers. The "Intranet" layer is a WEB Server building upon the second layer gateways to provide platform-independent access to selected information and images. The fourth layer, under evaluation, will extend access to the central data repository for Internet users of web browsers that support private-key/public-key encryption.
正在开发一个分层系统，以增强我们的遗留系统，使其成为基于网络的系统中的后端。系统的每一层都有定义好的功能，利用对下一层的投入，并遵循减少工作站支持需求的策略。大型机系统提供子系统的管理集成、安全性以及大多数信息的中央数据存储库。第二层是适用于Windows平台的系统图形用户界面（GUI）。主要依靠X终端和应用服务器，从而限制了支持需求。“内联网”层是基于第二层网关构建的Web服务器，用于提供对选定信息和图像的独立于平台的访问。正在评估的第四层将扩展对支持私钥/公钥加密的网络浏览器的互联网用户的中央数据存储库的访问。
