Service Trading in Open System
开放系统中的服务交易

Interoperability is a main feature of open system. In open system ,how to have dynamic selection of required services.manage these services effectively,and provide location transparence, is one of the most key problems for interoperability. Trading is a very efficient approach to solve the above problem. In this paper, we describe the trader (which is a facility to implement trading technology)in detail from the viewpoint of information and computation. At the end,we summa-rize the advantages of trader and point out some aspacts to be improved in the future.