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研究生： 陳志達
Chen, Jyi-Ta
論文名稱： 嵌入即時訊息於XML物件之事件通報系統
Embedding Lively Contents in XML Objects for an Event Notification System
指導教授： 蔡尚榮
Tsai, Shang-Rong
學位類別： 博士
Doctor
系所名稱： 電機資訊學院 - 電機工程學系
Department of Electrical Engineering
論文出版年： 2005
畢業學年度： 93
語文別： 英文
論文頁數： 104
中文關鍵詞： XML物件 、內容整合 、訊息發佈與訂閱系統 、XML 、事件通報 、資訊整合
外文關鍵詞： XDS, publish/subscribe, XML object, content syndication, Push, event brokering system
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    • 　　本文研究如何運用發佈/訂閱之非同步通訊模型以及XML儲存系統來實現一個以內容為基礎之訊息發佈與訂閱系統與功能強大的事件通報與內容整合系統。，此系統為運作於網際網路中提供多用途的訊息撮合及主動通報之應用服務，並進一步提供嵌入即時內容的功能。對資訊提供者而言，可以透過方便的介面輕易的提供資訊；對資訊消費者而言，能夠準確的訂閱想要的訊息，並且能夠方便地取得相關而且即時的資訊；對資訊整合者而言，為了解決單一應用的資訊內容常常不能提供完整資訊給資訊消費者的問題，資訊整合者可以按照不同的需求選擇一個主要應用與一些相關的應用，並選擇真正有興趣的資訊欄位以取得符合需求的整合資訊。在系統中以XML Object作為訊息的載體，使得訊息具有彈性的內容定義、自給自足、高可攜性的特點。研究中並提出以XML Object作為訊息操作的單位，讓事件訊息能夠嵌入以XML Object表示的多媒體即時內容，使得訂閱的事件內容更多樣化。

    　　In this paper, we apply a publish/subscribe asynchronous communication model, Push, and XML technology to construct a content-based event brokering system with an XML Storage System. The system provides a good solution to event matching, notification, and transmission services on Internet. With the system, the information publishers can easily publish information via a convenient user interface without programming. For getting useful and lively information, subscribers can choose a primary application and pick the interesting parts from other source applications. By using XML object as the event container to encapsulate any types of the message, we achieve the flexibility of content definition, self-contained data description, and high portability. According to the content syndication profiles, the information from source applications will create relationship and all the matching and useful events in target XML objects will be sent to subscribers periodically. With attachment XML object, the lively text/multimedia contents from related source applications can be embedded into target XML object. In addition, our system uses the XML Document Storage(XDS) system as the event exchange center to provide effective management for persistent event messages. The XDS is a data management approach based on XML object, and it provides an XML-based protocol for clients to access its services including storing, updating, and searching XML documents.

    Abstract ………………………………………………………… I Acknowledgements ……………………………………………….. III List of Figures ………………………………………………….… IX List of Tables ………………………………………………….… XII Chapter 1 ……………………………………………………... 1 Introduction 1.1 Motivation …………………………………………… 1 1.2 System Goal …………………………………………. 3 1.3 Related Work ………………………………………… 3 1.3.1 Related Content Base Publish/subscribe Systems …… 4 1.3.2 Related XML-based Content Syndication Systems …. 6 1.2.2.1 RSS(Really Simple Syndication) ……………………. 7 1.3.2.2 ICE(Information & Content Exchange) ……………… 10 1.3.2.3 Comparison between AXEB, RSS, and ICE …………. 11 Chapter 2 ………………………………………………… 14 Background 2.1 XML …………………………………………………. 14 2.2 XML Schema ………………………………………… 16 2.3 XML Stylesheet ……………………………………….. 19 2.4 Event Service ( Publish/Subscribe Model ) ……………… 20 2.5 Data Capture Template ………………………………… 23 2.6 Evolution of XEBS(XML Event Brokering System) ……… 25 2.6.1 First generation of XEBS ………………………… 26 2.6.2 Second generation of XEBS ……………………… 28 2.6.3 Third generation of XEBS ……………………….. 29 Chapter 3 ………………………………………………. 32 System Modeling 3.1 System Model ……………………………………… 32 3.2 The AXEBS Communication Model ………………….. 34 3.3 Scheme of Event Format …………………………….. 34 3.4 XML Information Object in AXEBS ………………….. 35 3.4.1 XML Information Object …………………….. 37 3.4.2 Text Object and System Metadata ………………. 37 3.4.3 Attachment Object …………………………….. 38 3.5 Content Syndication Modeling ………………………… 40 3.5.1 Relationship of XML Object(X-Relation) …………. 41 3.5.2 Discussion about how to choose data source ………. 44 3.5.3 Modes of data integration …………………………… 45 3.5.3.1 Virtual mode ………………………………….. 46 3.5.3.2 Base mode …………………………………….. 48 3.5.4 What operation the user can do with a VC? ……….. 50 Chapter 4 ……………………………………………………… 50 System Configuration and design 4.1 Design of Content Syndication Object …………………….. 50 4.2 X-Bind(Process of Content Syndication) …………………... 53 4.3 Content Assembling Operation …………………………….. 57 4.4 Storing strategy of Virtual XML Object …………………… 58 Chapter 5 ……………………………………………….. 60 System Architecture and Implementation 5.1 System Architecture …………………………………………. 60 5.2 System Administration Component ………………………… 61 5.3 Publication/Subscription Component ……………………… 62 5.4 Event Container Component ……………………………….. 62 5.5 Matching Daemon …………………………………………… 63 5.6 Notification Component and On-Line Event Reader …….. 63 5.7 Content Syndication Component …………………………… 65 5.7.1 Virtual Collection Constructor ……………………… 65 5.7.1.1 Content Syndication Editor ………………….. 66 5.7.1.2 Virtual Collection Generator ………………… 69 5.7.2 Virtual Collection Materialization ………………….. 70 Chapter 6 ……………………………………………….. 73 XML Document Storage 6.1 Introduction …………………………………………………. 73 6.2 Architecture of XDS ………………………………………… 74 6.2.1 Command Dispatcher and XDS Access API ……….. 75 6.2.2 Schema Subsystem …………………………………… 75 6.2.3 Access Path Table – the XML Schema Naming and Parsing 76 6.2.4 Data Storing Subsystem …………………………….. 79 6.3 Performance test …………………………………………… 79 Charter 7 ………………………………………………. 82 Future Work Charter 8 …………………………………………... 84 Conclusion Bibliography ……………………………………………… 87

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