Metadata - McGill Schulich Faculty of Music

Transcript Metadata - McGill Schulich Faculty of Music

Metadata Standards
Catherine Lai
MUMT-611 MIR
January 27, 2005
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Presentation Outline
 Definition of Metadata
 Functions of Metadata
 Types of Metadata
 Examples of Metadata Standards
 Conclusion and Outstanding Questions
 Questions and Comments
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Defining Metadata
 Structured data about data
 To identify, arrange, describe, and enhance
access to an information object
(screen shot of a partial Muse bibliographic record)
 Data describing digital resources
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Functions of Metadata
 To describe the record content
– what object contains or is about
 To document the record context
– who, what, why, where, how of creation
 To preserve record’s structure
– formal set of associations
 To provide intellectual access points for users
 To provide information in a physical reference
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Types of Metadata
Type
Example
Administrative - intellectual property rights
- version control
Descriptive
- i.d. finding aids
Structural
- hierarchical description
Preservation
- physical condition
Technical
- digitization information
Use
- exhibit record
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Examples of Metadata Standards





MAchine-Readable Cataloging (MARC)
Dublin Core (DC)
Text Encoding Initiative (TEI)
Encoded Archival Description (EAD)
Visual Resource Association Core Categories
(VRA Core)
 Metadata Object Description Schema
(MODS)
 Many others
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MARC
 Originated in 1966
 MAchine Readable Catalog
 First comprehensive computerized metadata
scheme
 MARC --> USMARC & CAN/MARC (1980s)
--> MARC 21 (1997)
 Metadata standard for library catalogs
 Maintained by the Network Development and
MARC Standards Office at LC and the
Standards and the Support Office at the
National Library of Canada
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Example of a MARC Record
Fixed fields -->
(Leader)
-------------computer generated
index
(Directory)
-------------Variable fields -->
(http://www.music.indiana.edu/tech_s/manuals/training/marc/record1.html)
 Tag (3-digit number)
 Indicator (1-digit number)
 Subfield (preceded by the delimiter e.g. ‡n)
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MARC Tag Group
 Numerically by function:
Tag group Function
0xx
Bibliographic control number and coded info
1xx
Main entries (personal name, corporate name)
2xx
Titles etc.
3xx
Physical description (dimension or size).
4xx
Series statements
5xx
Notes
6xx
Subject entries
7xx
Added entries other than subject and series
8xx
Series added entries
9xx
Local use fields
(http://www.oclc.org/bibformats/en/default.shtm)
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Example of a MARC Record
(http://www.oclc.org/bibformats/en/default.shtm)
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Dublin Core
 Developed in 1995 for web resources
 Set of 15 simple elements:
Title
Description
Source
Creator
Type
Relation
Subject
Format
Language
Publisher
Identifier
Coverage
Contributor
Date
Rights
 Support resource discovery (IR) on the web
 General and Easy
 Main usage currently embedded into HTML
meta tags
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Example of Dublin Core
<HTML>
<HEAD>
<TITLE>A Poem</TITLE>
<META NAME="DC.Title" CONTENT=”A Poem">
<META NAME="DC.Creator" CONTENT=”Lai, Catherine">
<META NAME="DC.Type" CONTENT="text">
<META NAME="DC.Date" CONTENT=”2005">
<META NAME="DC.Format" CONTENT="text/html">
<META NAME="DC.Identifier”
CONTENT="http://www.music.mcgill.ca/~lai/poem.html">
</HEAD>
<BODY><PRE>
A poem line 1
A poem line 2.
A poem line 3
A poem line 4.</PRE></BODY>
</HTML>
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TEI
 Launched in 1987
 Guidelines for encoding machine-
readable texts to the humanities and
social sciences
 “maximally expressive and minimally
obsolescent” (www.tei-c.org)
 Document structural hierarchy,
divisions, and characteristic tags
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Example of TEI Markup
<q>She'll happen do better for him nor ony o' t' grand
ladies.</q> And again, <q>If she ben't one o' th’ handsomest,
she's noan faàl, and varry good-natured; and i' his
een she's fair beautiful, onybody may see that.</q>
I wrote to Moor House and to Cambridge immediately, to
say what I had done: fully explaining also why I had thus
acted. Diana and 
(http://www.tei-c.org/Lite/U5-eg.html)
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Example of TEI Markup
I wrote to Moor House and to Cambridge immediately, to
say what I had done: fully explaining also why I had thus
acted. Diana and <pb n='475'/> Mary approved the step
unreservedly. Diana announced that she would just give me
time to get over the honeymoon, and then she would come
and see me.
(http://www.tei-c.org/Lite/U5-eg.html)
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Conclusion and Outstanding
Questions
 Little consensus on level of complexity
of semantic structure
– Need flexibility and scalability
 Different disciplines for different formats
– Need interoperability and accessibility
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Questions & Comments
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