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The Construction of a travel information retrieval system on Semantic Web 葉木水、陳鴻文

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The Construction of a travel information retrieval system on Semantic Web 葉木水、陳鴻文

E-mail: 9314357@mail.dyu.edu.tw

ABSTRACT

The issue of effectively using information and services become more important among Internet technologies. The concept of

"Semantic Web" was thus proposed to make Internet documents re-usable and explicit based on "Ontology". This research focuses on two folds: the ways of defining and constructing a Taiwan travel ontology, and then an efficient mechanism of information retrieval on Semantic Web. Since there is no tourist ontology available on Internet now, relevant information for trip were collected to define and build domain and information ontologies. In order of an efficient indexing the constructed information ontologies were further translated into relational databases from original DAML format. Besides, "top-down" management of Internet services was adopted; In other words, each ontology and related services need to be recorded in the registration center in advance. Under the environment, a novel information retrieval system using tag hierarchy within ontology was proposed and compared with traditional search mechanism. Four experiments illustrated that the results of proposed system was more accurate and less redundant.

Therefore, the now services based on Semantic Web could be expected to match users' demands more efficiently by offering the designed ontologies and proposed information retrieval mechanism.

Keywords : Semantic Web, Web Service, Information Retrieval, Ontology, DAML, JENA Table of Contents

封面內頁 簽名頁 授權書 iii 中文摘要 v 英文摘要 vi 誌謝 vii 目錄 viii 圖目錄 x 表目錄 xii 第一章 緒論 1 第一節 研究背景與動 機 1 第二節 研究目的 3 第三節 研究範圍與限制 4 第四節 研究內容與研究流程 5 第二章 文獻探討 7 第一節 語意網 7 第二節 語意網語言 9 第三節 知識本體 14 第四節 知識本體的開發工具 18 第五節 資訊檢索的探討 21 第六節 WSDL簡介 23 第三章 系統設計與研究方法 26 第一節 系統假設 26 第二節 都會旅遊知識本體 27 第三節 系統雛型架構 32 第四章 系統實作與效能 評估 44 第一節 開發工具與環境 44 第二節 系統實作 44 第三節 檢索實驗與方法 53 第五章 結論及後續研究建議 61 第一節 研究結論 61 第二節 未來研究方向 63 參考文獻 64 附錄A:旅遊詞彙庫 69 附錄B:階層編號表 70 附錄C:交通工具資 訊(1100)部份資料內容 71 附錄D:景點資訊(1200)部份資料內容 72 附錄E:住宿資訊(1300)部份資料內容 73 圖目錄 圖1.1 研 究流程...6 圖2.1 語意網上網頁設計語言之層級模型...8 圖2.2 XML文

件...10 圖2.3 RDF範例...11 圖2.4 Prot?g?-2000操作介面範例...20 圖2.5 WSDL架構...23 圖2.6 WSDL文件內容...24 圖3.1 本論文所採行之知識 本體涵蓋內容...27 圖3.2 本論文採行之旅遊知識本體...28 圖3.3 本論文所採行之交通領域知識 本體...29 圖3.4 本論文所採行之景點領域知識本體...30 圖3.5 本論文所採行之住宿領域知識本 體...30 圖3.6 以DAML語法描述景點部份領域知識本體...31 圖3.7 以DAML語法描述部份之景點資訊 實體...32 圖3.8 具有資訊檢索功能之旅遊語意網整體服務系統架構...33 圖3.9 標準SOAP訊息的內

容...34 圖3.10 資訊檢索模組之運作流程範例...35 圖3.11 都會旅遊資訊實體樹狀架構之階 層編號...37 圖3.12 階層編號表資料結構...38 圖3.13 旅遊詞彙庫資料表內

容...39 圖3.14 資訊檢索系統之標籤檢索部份程式碼...41 圖3.15 判定關鍵字詞階層關係的程式 碼...42 圖4.1 景點資訊類(木柵動物園)之部份DAML檔案內容...45 圖4.2 「交通工具資訊」之資訊實體 資料(DAML格式)...46 圖4.3 DAML檔與資料庫格式轉換的部份程式碼...48 圖4.4 轉換程式執行結

果...49 圖4.5 資料表格實際轉換的內容...49 圖4.6 資訊實體檢索系統之「樹狀結構查 詢」的介面...50 圖4.7 資訊實體檢索系統之「樹狀結構查詢」功能展開的介面...51 圖4.8 資訊實體檢索系統之「一 般查詢」介面...53 圖4.9 樹狀結構查詢之「查詢一」檢索結果...55 圖4.10 「樹狀結構查詢」之「查詢 二」檢索結果...56 圖4.11 一般查詢之查詢一檢索結果畫面...58 圖4.12 一般查詢之查詢二檢索結果畫 面...60 表目錄 表2.1 PROT?G? 2000與KAON的比較...19 表4.1 樹狀結構查詢之查詢一條件屬性表(至 第二層)...54 表4.2 樹狀結構查詢之查詢二條件屬性表(至第三層)...56 表4.3 一般查詢之查詢一檢索結果的比 較...58 表4.4 一般查詢之查詢二檢索結果的比較...60

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