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

这项研究的目的是调查用于管理，识别和定位信息的方法，这些信息是通过互联网网络（例如Internet。在数字库）等应用程序中分发的信息，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，而不了解对象的实际位置。在这项研究中，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的描述来查找资源标识符的一般方法。在互联网中的实际环境中，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，以显示存储位置。但是，获得适当的标识符并不容易。提出了URS的新概念（统一资源规范），这使得解决由属性规范组成的对象描述的持续能力……更多地输入URL中，从而使用户可以在不知道信息的确切位置的情况下发布查询。软件体系结构基于客户端服务器模型，我们采用了ANSI Z39.50 Z39.50协议标准。我们需要的是用于实验目的的轻重量协议，因此，我们为姓名解析目的修改并简化了Z39.50。姓名分辨率服务器返回了信息对象的标识符，根据客户的要求，该分辨率是根据规则基于规则的算法进行了简单的方法。从实际方面，还需要与基于HTTP的访问的兼容性，因此还实现了HTTP服务器和URS解析器之间的网关机制。常规的HTML浏览器可用于通过此网关访问URS解析器。该研究始终在1996年至1997年进行，我们认为我们的原型实施显示了拟议概念的可行性。评估原型的细节仍在进行进一步的进化。较少的

项目成果

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。

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 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（

Adachi,Jun: "Dissemination of Japanese Academic Journals over the Internet" Proceeding of ISDL'97. 32-35 (1997)

Adachi,Jun：“日本学术期刊在互联网上的传播”ISDL97 论文集。