Distributed Digital Information Access SearchDiscovery Resourcessuppliers Print Electronic
Distributed Digital Information Access Search/Discovery Resources/suppliers Print Electronic Full Text Multimedia Internet Resources Digital Libraries Stores Archives Internet Commercial Vendors Internet Public Domain Providers Government Interfaces Value-added Generic Gateway Subject Gateways Mechanisms User authentication help screens Search and merge Supply options Request supply Billing/payment Feedback Discussion lists Download facilities Library Catalogues Mirrors Z 39. 50 Commercial Directories Viewing Search Engines Caches Internet Directories Web Archives Digital library Search servers Pointers/links to subject specific information Licensing arrangement Copy right management
重要文件的出現 • Report to The President (President’s Information Technology Advisory Committee, Feb. 2001) – Digital Libraries: Universal Access to Human Knowledge • Bibliographic Control of Web Resources: A Library of Congress Action Plan (July, 2001) • 數位圖書館相關技術規範 (國家圖書館Sep. 2001) • …
電腦與網路系統架構 • Mainframe architecture • Client-Server architecture – Middleware – Z 39. 50 • Multi-tier client server
Mainframe User interface DBMS data Mainframe Computer Manager user query interaction Dumb terminal Security Lock data Retrieve data Select, sort, calculate data Present information
Two – tier Client/Server 架構概略圖 Database System INTERNET 登入Home Page 選擇檢索作業 Meta資料管理系統 Browser 瀏覽器 後台作業(Back end) • 資料建檔 • Meta Schema更新 一般使用者 前台作業(Front end)
HTTP 伺服器 User HTTP 網頁瀏覽器 HTTP 轉譯 Z 39. 50 origin Z 39. 50 target 轉譯 伺服端 HTTP/Z 39. 50 gateway 之系統架構 資料庫
TANET NTU CAMPUS BACKBONE ATM/SONET CNX 600 電算中心 Video Server DECNIS 600 電算中心 FDDI GIGASWITCH FDDI 電算中心 Linkswitch 3000 FDDI DECNIS 600 研圖 FDDI 總圖 3 F 319機房 Net. Builder II ROUTER 總圖B 1 221機房 DECHUB 900 跳 線 架 總圖B 1 221機房 DECHUB 900 跳 線 架 Decserver 700 Remot e Dial Up 跳 線 架 總圖 3 F 319機房 SWITCH Network Management Station 台灣大學總圖書館 資訊網路架構圖 NTU_LIB FILE SERVERS 圖書管理系統 FIBER OPTIC CABLE CAT 5 UTP CABLE B 86106002 劉恆孝 B 86106019 簡郁馨 B 86106024 趙宛平
- Slides: 23