就WWW資訊檢索應用而言,資源必須經過有系統地組織與整理,才能得到滿意的檢索結果。控制詞彙的角色在前述的背景下,扮演越來越關鍵的角色。控制詞彙通常是透過索引典或是主題表體現,提供詞彙之間的等同關係、階層關係、與關連關係。藉由索引典,使用者可以瞭解資訊系統的知識結構,可以選擇適切的檢索詞彙,以獲致比較滿意的檢索結果。然而,索引典的建構與管理卻是一項困難工作,若沒有設計良好的系統,則無法有效地發揮索引典的長處。目前沒有資訊檢索系統或是數位圖書館系統完全整合索引典子系統,使得檢索效能始終不高。本文探討索引典的建置,發展索引典系統的功能模式,建立索引典建置與管理之模式,並實作雛型系統。
From the viewpoint of WWW-based IR researches, the metadata and resource description framework become much more important than ever before. Therefore, the application of the controlled vocabularies increasingly plays an important role. The recent literature also report that controlled vocabularies significantly improve IR effectiveness. Thesauri and Subject Headings consist of controlled vocabularies and represent the knowledge structures in various relations in details. However, the construction and management of thesauri is not an easy task and the integration of thesaurus subsystem into IR systems or Digital Library/Museum is not considered in the current IR systems or DL projects. The paper will investigate the applications of thesauri and subject heading, propose a model to handle the thesauri or the subject headings in a systematic way, and implement the prototype of a practical system.