內容導向之資料交換模型

Abstract

在分散式環境中，非同步式（asynchronous）資料交換已經漸漸的顯露出它的實用價值，而各個分散式平台也都提出了自己的非同步式資料交換機制，在CORBA標準之下的就是Event物件服務。然而，在CORBA環境下我們需要一個比Event service功能更強的資料交換系統，以滿足多樣化的功能需求。 本論文利用XML標示語言與Event service的結合，開發了內容導向的資料交換系統：CODEX（Content-Oriented Data EXchange system），以資料交換之內容為導向，再加上基本資料型態的檢查、資料的分級、參與資料交換者的身份識別與身份的過濾等功能。希望本論文所提出的架構與設計，可作為其他相關研究的參考；實作方面，CODEX系統也可作為更進一步發展的良好基石。

Asynchronous data exchange shows its practical value in the distributed system recently, and great majority of distributed systems have its own asynchronous data exchange module now. In the CORBA standard, it is event service that plays the role. But we need a more powerful data exchange system than event service to satisfy various requirements of function in the CORBA environment. In this paper, we develop a system named “CODEX” for Content-Oriented Data EXchange system, which combines the feature of mark-up language XML and the ability of CORBA event service. CODEX contains functions like primitive data type checking, data classification and filtering, user identity and user filtering etc. Hopefully, the framework and design in this paper will provide useful references for other relative researches; and at the same time, the CODEX implementation will be served as the foundation of advanced data exchange system.