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Proposed encoding schemes for DC-Library Application Profile

Proposals for encoding schemes in DC-Lib AP

6 June 2003

This constitutes a series of "fast-track" proposals for adding encoding schemes that are needed in the Dublin Core Library Application Profile. These do not include any proposals for the element Subject, which has an experimental tool for encoding scheme registration. This document will be discussed at the Dublin Core Usage Board meeting in June 2003 in Ithaca, N.Y.


1. Background.

The Dublin Core Library Application Profile specifies a number of encoding schemes that provide rules for encoding or controlled lists of values to be used with Dublin Core elements. In the absence of a registration tool (which currently is being tested for registering subject schemes), this document proposes these schemes for use with Dublin Core elements other than Subject.

One issue is the URI for an encoding scheme that is maintained outside of DCMI. There are a number that are already available with Dublin Core URIs (e.g. http://purl.org/dc/terms/LCSH ). As other institutions, particularly the Library of Congress, assigns URIs to its metadata elements, the situation will exist where more than one persistent name exists for the given encoding scheme: that assigned in DCMI terms and the one assigned by the maintenance agency. This issue needs to be considered in registering new DCMI encoding schemes.

 


2. Proposals for encoding schemes

Term Name: ISO8601

  URI (proposed): http://purl.org/dc/terms/ISO8601
  Label: ISO8601
  Definition: This encoding scheme represents the alternative provided in ISO 8601 that does not include hyphens as separators between year, month, and day.
  Type of Term: encoding-scheme
  Qualifies:

http://purl.org/dc/elements/1.1/date
http://purl.org/dc/element/1.1/coverage
http://purl.org/dc/terms/temporal

  Availability and maintenance status ISO document (available for a fee)
  Appropriateness of maintenance agency Appropriate
  Uniqueness and appropriateness of proposed token Unique, but may be confusion with the other alternative in 8601 with hyphens, defined in DC as w3cdtf.
  Possible use with elements not specified in proposal  
  Other comments Rules for encoding: ISO 8601 has alternatives, with or without the hyphen (i.e. 2001-08-07 or 20010807). W3C-DTF includes hyphens and is the only encoding scheme currently approved in DCMI. Alternative using no hyphen needs to be registered as an encoding scheme, since it is well established in the library community.

 

Term Name: AAT

  URI (proposed): http://purl.org/dc/terms/aat
  Label: AAT
  Definition: Art and Architecture Thesaurus
  Type of Term: encoding-scheme
  Qualifies:

http://purl.org/dc/elements/1.1/type
http://purl.org/dc/element/1.1/subject

  Availability and maintenance status Available at:http://www.getty.edu/research/tools/vocabulary/aat/
Maintained by Getty Research Institute
  Appropriateness of maintenance agency Appropriate
  Uniqueness and appropriateness of proposed token Unique and appropriate
  Possible use with elements not specified in proposal  
  Other comments  

 

Term Name: TGM2

  URI (proposed): http://purl.org/dc/terms/gmgpc -or- http://www.loc.gov/marc.sourcecodes.gmgpc
  Label: gmgpc
  Definition: Thesaurus for Graphic Materials II: Genre and physical characteristic terms
  Type of Term: encoding-scheme
  Qualifies:

http://purl.org/dc/elements/1.1/type

  Availability and maintenance status Available at: http://www.loc.gov/rr/print/tgm2/
Maintained by the Library of Congress, Prints and Photographs Division
  Appropriateness of maintenance agency Appropriate
  Uniqueness and appropriateness of proposed token Unique and appropriate
  Possible use with elements not specified in proposal  
  Other comments URI and label based on code already defined in MARC Code List for Relators, Sources, Description Conventions and used in bibliographic records.
A thesaurus of more than 600 terms developed by the Library of Congress Prints and Photographs Division with input from other archival image repositories

 

Term Name: SICI

  URI (proposed): http://purl.org/dc/terms/sici
  Label: SICI
  Definition: Serial Item and Contribution Identifier
  Type of Term: encoding-scheme
  Qualifies:

http://purl.org/dc/elements/1.1/identifier
http://purl.org/dc/elements/1.1/relation
http://purl.org/dc/elements/1.1/source

  Availability and maintenance status Registered as a National Information Standards Organization standard Z39.56
Maintenance by Univeristy of California, Berkeley. http://sunsite.berkeley.edu/SICI/
  Appropriateness of maintenance agency  
  Uniqueness and appropriateness of proposed token  
  Possible use with elements not specified in proposal  
  Other comments Registration as a URN namespace has been attempted. See: http://draft-ietf-hakala-sici-01.txt

 

Term Name: ISBN

  URI (proposed): http://purl.org/dc/terms/isbn
  Label: ISBN
  Definition: International Standard Book Number
  Type of Term: encoding-scheme
  Qualifies:

http://purl.org/dc/elements/1.1/identifier
http://purl.org/dc/elements/1.1/relation
http://purl.org/dc/elements/1.1/source

  Availability and maintenance status International ISBN Agency
http://www.isbn.org
  Appropriateness of maintenance agency Appropriate
  Uniqueness and appropriateness of proposed token Unique
  Possible use with elements not specified in proposal  
  Other comments ISBNs may also be expressed as URIs. See: http://www.ietf.org/rfc/rfc3187.txt
This proposal implies using the "raw" ISBN as an identifier.

 

Term Name: ISSN

  URI (proposed): http://purl.org/dc/terms/issn
  Label: ISSN
  Definition: International Standard Serial Number
  Type of Term: encoding-scheme
  Qualifies:

http://purl.org/dc/elements/1.1/identifier
http://purl.org/dc/elements/1.1/relation
http://purl.org/dc/elements/1.1/source

  Availability and maintenance status Maintained by:International ISSN Agency
http://www.issn.org for information
  Appropriateness of maintenance agency Appropriate
  Uniqueness and appropriateness of proposed token Unique
  Possible use with elements not specified in proposal  
  Other comments ISSNs may also be expressed as URIs. See: http://www.ietf.org/rfc/rfc3044.txt
This proposal implies using the "raw" ISSN as an identifier.

 

Term Name: DOI

  URI (proposed): http://purl.org/dc/terms/doi -or- DOI namespace URI
  Label: DOI
  Definition: Digital Object Identifier
  Type of Term: encoding-scheme
  Qualifies:

http://purl.org/dc/elements/1.1/identifier
http://purl.org/dc/elements/1.1/relation
http://purl.org/dc/elements/1.1/source

  Availability and maintenance status Maintained by: International DOI Federation
http://www.doi.org for information
  Appropriateness of maintenance agency  
  Uniqueness and appropriateness of proposed token  
  Possible use with elements not specified in proposal  
  Other comments

The IDF has attempted to register DOI as a URI scheme, but its application has not yet been accepted.

 

Term Name: MARC GAC

  URI (proposed): http://purl.org/dc/terms/marcgac -or- http://www.loc.gov/marc.gac
  Label: GAC
  Definition: MARC Geographic Area Codes
  Type of Term: encoding-scheme
  Qualifies:

http://purl.org/dc/elements/1.1/coverage
http://purl.org/dc/terms/spatial

  Availability and maintenance status Maintenance agency is Library of Congress
http://www.loc.gov/marc/geoareas/
  Appropriateness of maintenance agency Appropriate
  Uniqueness and appropriateness of proposed token Unique
  Possible use with elements not specified in proposal  
  Other comments

This list includes different codes than the ISO standard ISO3166, which also includes country codes. Used in millions of MARC bibliographic records.

 

Term Name: MARC Country codes

  URI (proposed): http://purl.org/dc/terms/marc-countries -or http://www.loc.gov/marc.countries
  Label: MARC Countries
  Definition: MARC Country Codes
  Type of Term: encoding-scheme
  Qualifies:

http://purl.org/dc/elements/1.1/coverage
http://purl.org/dc/terms/spatial

  Availability and maintenance status Maintenance agency is Library of Congress
http://www.loc.gov/marc/countries/
  Appropriateness of maintenance agency Appropriate
  Uniqueness and appropriateness of proposed token Unique
  Possible use with elements not specified in proposal  
  Other comments

This list includes different codes than the ISO standard ISO3166, which also includes country codes. Used in millions of MARC bibliographic records.

 

 


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