Information Retrieval System

DIGITAL LIBRARIES

Gopal DasASU2012010100025

Outline Introduction Ingredients for DLs

Hardware Software Hardware- Software Network

Components of a DL system User interfaces Repository Handle system Search system

Modern Features in Digital Library Architectures

Introduction

A digital library is a library in which collections are stored in digital formats (as opposed to print, or other media) and accessible by computers.

The digital content may be stored locally, or accessed remotely via computer networks. A digital library is a type of information retrieval system.

It provides the architecture to model, map, integrate, condense and transform scattered information housed in digital documents.

Companies can perform more substantive, accurate and consistent analyses using the digital library as a foundation for decision support system.

Ingredients for DLs

Hardware The minimum machinery to do the job

Software The programs for handling data

Digital Objects Articles, Conference Papers, Thesis,……

Basic Skills Things one has to learn

Hardware

A Server You’ll need access to a web server

A good PC Scanners

Flatbed – Auto feed, Back to backMFBook Scanner

Software

Open Source Software (OSS) Dspace, E-Prints, Fedora, GSDL……

Proprietary software you can’t avoid Image Editing and Optical Character Recognition Software have to be

purchased

Hardware- Software Network

High-speed local networks and fast connections to the Internet Relational databases that support a variety of digital formats Full text search engines to index and provide access to resources Web servers and FTP servers (both intranet and internet) Electronic document management functions

Components of a DL system User interfaces Repository Handle system Search system

User interfaces

User interface for end-users to get access to the library and its collections

User interface for librarians and system administrators who manage collections

Repository

Repositories store and manage digital objects and other information. A large digital library may have many repositories of various types, including modern repositories, legacy databases, and Web servers.

The repository access protocol (RAP). Is used to recognize the rights and permissions that need to be satisfied before a client can access a digital object.

Handle system

Handles are general purpose identifiers that can be used to identify digital objects, over long periods of time and to manage materials stored in any repository or database.

DOI: Digital Object Identifiers Example: 10.1234/NP5678

10.5678/ISBN-0-7645-4889-4

Persistent Uniform Resource Locator (PURL) developed by OCLC – names the location of an object

Search system

There will be many indexes and catalogs in a digital library that can be searched to discover information before retrieving it from a repository.

These indexes may be independently managed and support a wide range of protocols.

Databases, information retrieval systems, and content management systems are examples

Modern Features in Digital Library Architectures

Social networking sites Social networking, bookmarking and tagging Reviews Recommendation features Citation and reference linking Bibliometric tools

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