Metadata and its Use in the Field of Information Retrieval Environment

Metadata and its Use in the Metadata and its Use in the Field of Information Field of Information

Retrieval EnvironmentRetrieval Environment

Dr. Umesha NaikDr. Umesha Naik Prof. D ShivalingaiahProf. D Shivalingaiah

Department of Library and Information ScienceDepartment of Library and Information ScienceMangalore UniversityMangalore University

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1. Introduction1. Introduction• Metadata is one of the most important aspects of

content management and website design. • It is an essential tool for understanding information

stored in data warehouses and has become increasingly important in HTML, XML-based web applications.

• The information available in the internet is easily and vast accessible that library and information users expect information services based on metadata.

• The Dublin Core Metadata Initiative was motivated by the guiding principle of producing a metadata element

• OCLC initiated a project in 1994 to experiment with cataloging Web resources by using the AACR2 and MARC format.

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Cataloguing (Item and Collections) MARCResource DiscoveryWeb Search EngineElectronic CommerceE-commerce, E-managementIntelligent Software AgentsTools and TechniquesDigital SignaturesDigital ObjectsContent Rating Search Engine and Ranking tools. Intellectual Property RightsCopy rightPrivacy Preferences & PoliciesProtection, Proxy, Firewall etc.

2. Applications of Metadata2. Applications of Metadata

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Descriptive Metadata

Structural Metadata

Administrative Metadata

3. Types of Metadata3. Types of Metadata

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4.1 Resource Discovery •Allowing resources to be found by relevant criteria; • Identifying resources; • Bringing similar resources together; • Distinguishing dissimilar resources; • Giving location information.  

4. Functions of Metadata4. Functions of Metadata

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4.2 Organizing e-resources •Organizing links to resources based on audience or topic. •Building these pages dynamically from metadata stored in databases.  

4.3 Facilitating Interoperability•Using defined metadata schemes, shared transfer protocols, and crosswalks between schemes, resources across the network can be searched more seamlessly.

Cross-system search, e.g., using Z39.50 protocol;

Metadata harvesting, e.g., OAI protocol.  

4. Functions of Metadata

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4.4 Digital identification•Elements for standard numbers, e.g., ISBN •The location of a digital object may also be given using:

a file name a URL some persistent identifiers, e.g., PURL

(Persistent URL); DOI (Digital Object Identifier)

Combined metadata to act as a set of identifying data, differentiating one object from another for validation purposes.

4. Functions of Metadata

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4.5 Archiving and Preservation• Challenges:

Digital information is fragile and can be corrupted or altered;

It may become unusable as storage technologies change.

• Metadata is key to ensuring that resources will survive and continue to be accessible into the future. Archiving and preservation require special elements: to track the lineage of a digital object, to detail its physical characteristics, and to document its behavior in order to emulate it

in future technologies.

4. Functions of Metadata

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4.6 Character Encodings • Used for communicating text characters

in a computing environment• Hundreds of character encoding

standards exist• Character conversion is complex and

expensive

4. Functions of Metadata4. Functions of Metadata

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4.7 Unicode• A single, “comprehensive” global

encoding standard• Includes characters from scripts of all

major modern, most minor, and selected ancient languages

4. Functions of Metadata4. Functions of Metadata

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Dublin Core Metadata ElementsMetadata ElementsMetadata Elements

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MODS-MODS-Metadata Object Description SchemaMetadata Object Description Schema

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Metadata Development OrganizationsMetadata Development Organizations

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Metadata ToolsMetadata Tools

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ConclusionConclusion

• Metadata is a standard and an essential tool in this digital era

• To improve access to information regardless of the location, format and structure of the resources.

• Such technology greatly improved the publication and dissemination of information and resulted in a widely faster increase in the volume and complexities of digital resources.

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Thank YouThank You