A Study on resource discovery mechanism in distributed information networks

分布式信息网络资源发现机制研究

• 批准号: 08458091
• 负责人: ADACHI Jun
• 金额: $ 4.03万
• 依托单位: National Center for Science Information Systems
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08458091/
• 关键词: name management; WWW; URL; Multimedia Database; Database; HTTP; Digital library

The aim of this research was to investigate methods for managing, identifying and locating information which is distributed over a wide-area network, such as the Internet.In applications such as digital libraries, users tend to access and retrieve objects, e.g., pages of scientific paper, pictures, and numerical data without knowing actual locations of the objects. In this research, these materials are abstractly termed as 'information resource' and a general approach to look for identifiers of resources based on the description of attributes of the specific information resources.In actual environment in the Internet, users have to use URLs or other location information, since these are identifiers of information resources which shows the storage locations. However, it is not easy to get appropriate identifiers. The new concept of URS (Uniform Resource Specification) is proposed and this gives a persistent capability to resolve object description composed of the attribute specification … More into URL,thus allowing users to issue a query without knowing exact location of information.The software architecture employed in this investigation is based on a client-server model, and we adopted ANSI Z39.50 protocol standard for this purpose. What we needed is a light-weight protocol for experimental purpose, therefore, we modified and simplified Z39.50 for a name resolution purpose.The name resolution server returns an identifier of information object, upon the request from a client giving URS.The mechanism employed for this resolution is a simple method according to rule-based algorithm. From a practical aspect, compatibility with HTTP based accesses is also required, thus a gateway mechanism between a HTTP server and a URS resolver was also experimentally implemented. conventional HTML browser can be used to access to URS resolver through this gatewasy.The research was pursued through 1996 to 1997 and we think that our prototype implementation shows the feasibility of the proposed concept. Evaluation of the details of the prototype is still going on for further evolution of the approach. Less

本研究的目的是研究管理、识别和定位分布在广域网（如Internet）上的信息的方法。在数字图书馆等应用中，用户倾向于访问和检索对象，例如，科学论文、图片和数字数据的页面，而不知道对象的实际位置。在本研究中，这些材料被抽象地称为“信息资源”，是一种基于特定信息资源属性描述来寻找资源标识符的通用方法。在互联网的实际环境中，用户必须使用URL或其他位置信息，因为这些是信息资源的标识符，显示存储位置。然而，要找到合适的标识符并不容易。统一资源规范URS（UniformResourceSpecification）的提出，为解决由属性规范组成的对象描述提供了持久的能力 ...更多信息 本研究所采用的软件架构是基于客户端-服务器模型，我们采用了ANSI Z39.50协议标准。我们需要的是一个轻量级的协议用于实验目的，因此，我们修改和简化Z39.50的名称解析的目的，名称解析服务器返回一个信息对象的标识符，从客户端的请求，给出URS。从实际应用的角度考虑，还需要与基于HTTP的访问兼容，因此在HTTP服务器和URS解析器之间也实验性地实现了网关机制。传统的HTML浏览器可以通过这个网关访问URS解析器。这项研究持续了1996年到1997年，我们认为我们的原型实现表明了所提出的概念的可行性。对原型细节的评价仍在进行，以便进一步改进这一方法。少

项目成果

Ohta, Takasu, Adachi: "Probabilistic Refrieval Methods for Text with Miss recognized OC character" Pro.of Workshop on Information Refrieval. 35-41 (1996)

Ohta、Takasu、Adachi：“具有小姐识别的 OC 字符的文本的概率检索方法”Pro.of 信息检索研讨会。

Adachi, Jun: "The Digital Library Project at NACSIS (In Japanese)" Information Processing. Vol.37, No.9. 826-830 (1996)

Adachi, Jun：“NACSIS 的数字图书馆项目（日语）”信息处理。

安達淳: "学術情報センターのディジタル図書館プロジェクト"情報処理. 37・9. 826-830 (1996)

安达淳：“学术信息中心的数字图书馆计划”信息处理37・9（1996）。

Adachi, Jun and Matsumura, Atsushi: "Information Access Method for Distributed Digital Library Systems (In Japanese)" The proceedings of the 55th annual conference of IPSJ,September 1997.

Adachi, Jun 和 Matsumura, Atsushi：“分布式数字图书馆系统的信息访问方法（日文）” IPSJ 第 55 届年会论文集，1997 年 9 月。

Ohta, M., Takasu, A.and Adachi, J.: ""Probabilistic Retrieval Methods for Text with Miss-Recognized OCR Characters" The proceedings.of the Workshop on Information Retrieval with Oriental Languages, Taejon, Korea. 35-41 (1996)

Ohta, M.、Takasu, A. 和 Adachi, J.：“带有错误识别的 OCR 字符的文本的概率检索方法”东方语言信息检索研讨会的记录，韩国大田。35-41（