Metadata

1. M.l.i.sc 3rd sem
Central university of Gujarat

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 What is standards
Why use existing standards
 what is Metadata
Why is Metadata Important
 Types of metadata
 Examples of metadata standards
 dublin core ,MARC ,EAD ,MODS ,RDF
MITS.

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A standard is a document that provides requirements, specifications, guidelines or characteristics that can be used consistently to ensure that materials, products, processes and services are fit for their purpose.

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Cost saving
Access to help and advice
Usability
Resource discovery
Sustainability

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―Data about data‖
a set of data that describes and gives information
about other data.
 Metadata answer who, what, when, where,
why, and how about every facet of the data
that are being documented

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Increased accessibility
Ability for different systems to talk to one
another
Expanding use
Multi-versioning
Preservation
Cost considerations

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5 types of metadata:
Descriptive – Title, author, topic, etc.
Administrative – Record number, record date, etc.
Technical – File size, software needed, etc.
Rights – Copyright ownership, etc.
Management – typically by/for owning agency
(Price paid, circulation restrictions, etc.)

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MARC21 Formats--Representation and communication of descriptive metadata about information items
ISO 2709-based metadata communications protocol
International standard (maintained by LC)
Well-maintained, mature standard
Widely adopted by library communities
Field/record size limitations
No ability to embed related objects (e.g. book cover GIF)
Limited ability to convey hierarchical/complex relationships
Narrow focus on cataloging

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MODS (Metadata Object Description Standard)—XML markup language for selected data from MARC21 records as well as original resource description
Richer than Dublin Core; library-oriented XML metadata schema
 Can accommodate AACR2 standards
Maintenance agency: Library of Congress
Well-suited as a metadata format for OAI harvesting
MARC21 readily converts to MODS; however, cannot readily do a reverse conversion of MODS to MARC21
Community best practice guidelines would enhance usefulness

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EAD (Encoded Archival Description)—XML markup design for encoded finding aids using Standard Generalized Markup Language
EAD header carries metadata for finding aid
Standard maintained by LC along with SAA
suited for archival description
Provides simple or complex mark-up design to support varying levels of indexing
Needs help at the item level

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Dublin Core – Metadata element set (for description of digital objects)
Maintenance agency: Dublin Core Metadata Initiative (DCMI) hosted by OCLC Research
Achieve international standardization (ISO 15836)
Intended for use by both non-catalogers and specialists
No MARC tags used with Dublin Core metadata
Worldwide adoption (DCMES translated into 20+ languages)
No consistency across different projects using Dublin Core
Documentation for Dublin Core not well-defined

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Metadata Encoding and Transmission Standard (METS)
A standard ―shell‖ for encoding data essential for retrieving, preserving, and serving up digital resources
Six modules define descriptive, administrative, structural, rights and other metadata
Some parts of a METS object may be external (e.g., a MODS record for the descriptive metadata)
Maintenance agency: Library of Congress

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Resource Description Format (RDF)
RDF provides interoperability between applications that exchange machine-understandable information on the Web
Designed to convey metadata for machine consumption (raw RDF is not very human-readable)
A subject of debate (typically RDF vs. XML)!
Fundamental building block of RDF is the triple (subject + predicate + object)
Maintained by the W3C; RDF specification under revision

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Thank You !!!