Online public access catalog

圖書館的館藏目錄是使用者開啟館藏之鑰，可以協助使用者了解館藏的出處、辨識和選擇不同的版本。圖書館館藏目錄使用研究，則有助於瞭解使用者使用的檢索點、使用的檢索技巧，如提供關鍵字和布林邏輯檢索、限制檢索(如切截等)、使用時遇到的困難，或者進一步分析使用者使用的檢索詞彙等。這些瞭解，不僅有助於圖書館對使用者資訊尋求行為的掌握，並可做為改善系統設計之參考。本文以1985年至1999年，近十五年的英文文獻為探討的對象，分析線上目錄使用者使用的檢索點、檢索失敗的原因、使用的檢索策略、使用者對改善線上目錄的看法、線上公用目錄使用者教育等問題。

The Online Public Access Catalog (OPAC) is the best gateway for users to get access to library collections and to locate library materials. Through the use studies of OPAC, libraries can understand the information seeking behavior of its users, and can improve on their own design of OPAC system. This paper reviews the related OPAC research literatures in English in the past 15 years (1985-1999), analyzed the users’ problems of access points, search terms, search strategies, and other related issues on training users.

本研究主要探討OPAC文獻之基本特性，如：文獻成長情形及出版品類型、語言、作者與期刊之分佈情形，並以書目計量學之洛卡定律和布萊德福定律，加以驗證著者生產力與期刊文獻之分佈。研究結果發現1975至2000年間，OPAC文獻仍持續的成長，呈現邏輯斯第曲線的成長模式；文獻發表的語言以英語最為普遍，並且以強調新穎性的期刊類型為主要出版品；出版一篇文獻的作者佔77.82%；利用布萊德福定律求出八種核心期刊。在文獻作者生產力與期刊文獻分佈方面符合洛卡定律與布萊德福定律之結果。

On the basis of bibliometric analysis, this study explores the characteristics of the OPAC literature, such as the literature growth, document type, language, author productivity and the distribution of journal articles. The OPAC literature, 1975-2000, shows an example of logistic growth. English is the predominant language and the most popular form of publication is the journal article. The vast majority of authors, (77.82%), publish one article only in the subject of OPAC. English core journals were identified based on Bradford’s law. The results of the present study also revealed that author and journal productivity were consistent with Lotka's law and Bradford's law.