关键词: 遗留系统, 网络服务, 简单对象访问协议, 网络服务描述语言

Abstract: In order to integrate legacy systems in process industry effectively, a web service-based information integration model was presented. Firstly, the characteristics of legacy systems in process industry were analyzed, and the data and functions that need to be published were confirmed. Then the legacy systems were wrapped into Web service through Web Service Wrapper technology. With different integration goals, enterprises could dynamically integrate these Web services distributed in different domains. Due to adoption of wrapping technology for those legacy systems, original security and stability of legacy systems in the integration platform were guaranteed. Finally, the validity and practicability of the integration technology were verified through the application in the establishment of computer information integration platform of Mini-Plant.

Key words: legacy system, Web service, simple object access protocol, Web service description language