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 !!!