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现代图书情报技术  2000, Vol. 16 Issue (6): 75-79     https://doi.org/10.11925/infotech.1003-3513.2000.06.23
  海外动向 本期目录 | 过刊浏览 | 高级检索 |
数字化图书馆和WWW站点及其页面的持续性
Wallace Koeh ler [著]  张莹[译]
(美国俄克拉荷马大学图书情报学院)
Digital Libraries and World Wide Web Sites and Page Persistence
Wallace Koehler
(School of Library and Information Studies, University of Oklahoma, USA)
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摘要 

依据Web 页面和W eb 站点可以被搜集和分类, 文章探讨的主题是:WWW 构成图书馆。结论是:Web 不是数字化图书馆, 但是图书馆可以从Web 中选择搜集材料。Web 文献有两种变化形式。第一种变化形式是本文所谈论的“持续性”; 第二种变化形式是W eb 页面或Web 站点信息的变化。本文力求更进一步认识Web 页面和Web 站点的生存期, 生存期的变化会影响具有Web 信息的图书馆的完整性和有效性, 然而如果能够认识这些变化就可以进行控制和管理。

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关键词 Web Library持续性信息管理生存期    
Abstract

Web pages and Web sites, some argue, can either be collected as elements of digital or hybrid libraries, or, as other would have it, the WWW is itself a library. We begin with the assumption that Web pages and Web sites can be collected and categorized. The paper explores the proposition that the WWW constitutes a library. We conclude that the Web is not a digital library. However, its component parts can be aggregated and included as parts of digital library collections. These, in turn, can be incorporated into“hybrid, libraries. ”These are libraries with both traditional and digital collections.Material on the Web can be organized and managed, Native documents can be collected in situ, disseminated, distributed,catalogueed, indexes, controlled, in traditional library fashion. The Web therefore is not a library, but material for library collections is selected from the Web. That said, the Web and its component parts are dynamic. Web documents undergo two kinds of change. The first type, the type addressed in this paper, is“persistence”or the existence or disappearance of Web pages and sites, or in a word the lifecycle of Web documents. “Intermittence”is a variant of persistence, and is defined as the disappearance but reappearance of Web documents. At any given time, about five percent of Web pages are intemittent,which is to say they are gone but will return, Over time a Web collection erodes. Based on a 120- week longitudinal study of a sample of Web documents, it appears that the half- life of a Web page is somewhat less than two years and the half- life of a Web site is somewhat more than two years. That is to say, an unweeded Web document collection created two years ago would contain the same number of URL s, but only half of those URLs point to content. The second type of change Web documents experience is change in Web page or Web site content. A gain based on the Web document samples, very nearly all Web pages and sites undergo some form of content with in the period of a year. Some change content very rapidly while others do so infrequently (Koehler, l999a). This paper examines how Web documents can be efficiently and effectively incorporated into library collections. This paper focuses on Web document lifecycles: persistence, attrition, and interm it tence, while the frequency of content change has been reported (Koehler, 1999a) , the degree to which those changes effect meaning and therefore the integrity of bibliographic representation is yet not fully undersatood. The dynamics of change sets Web libraries apart from the traditional library as well as many digital libraries. This paper seeks then to further our understanding of the Web page and Web site lifecycle. These patterns challenge the integrity and the usefulness of libraries with Web content. However, if these dynam ics are understood, they can be controlled for or managed.

Key wordsWeb library    Persistence    Information management    Lifecycle
收稿日期: 2000-04-22      出版日期: 2000-12-25
通讯作者: Wallace Koeh ler [著] ,张莹[译]   
作者简介: Wallace Koeh ler [著] ,张莹[译]
引用本文:   
Wallace Koeh ler [著] ,张莹[译]. 数字化图书馆和WWW站点及其页面的持续性[J]. 现代图书情报技术, 2000, 16(6): 75-79.
Wallace Koehler. Digital Libraries and World Wide Web Sites and Page Persistence. New Technology of Library and Information Service, 2000, 16(6): 75-79.
链接本文:  
https://manu44.magtech.com.cn/Jwk_infotech_wk3/CN/10.11925/infotech.1003-3513.2000.06.23      或      https://manu44.magtech.com.cn/Jwk_infotech_wk3/CN/Y2000/V16/I6/75

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