DDC Update: Formats, WebDewey 2.0, and Linked Data

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DDC UpdateFormats, WebDewey 2.0, and Linked
Data

• Joan S. Mitchell
• Editor in Chief, DDC
• OCLC
• Dewey Translators Meeting
• IFLA 2009, Milan
• 25 August 2009

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Changes in the Representation of the DDC

• Adoption of the MARC 21 classification and
  authority formats for the representation of the
  DDC in the new Editorial Support System (ESS)
• Change in the DDC distribution format from ESS
  XML to MARCXML
• Conversion of data format in the Pansoft
  translation support software to MARCXML
• Changes in the MARC 21 formats

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Changes in the MARC 21 Formats

• MARC Proposal No. 2008-01
• Submitted jointly by the Dewey editorial team,
  Deutsche Nationalbibliothek (DNB), Library of
  Congress, and OCLC
• Added to MARC 21 in Update No. 9 (October 2008)
• Implemented by OCLC in WorldCat on 16 August 2009
  http//www.oclc.org/support/documentation/worldcat
  /tb/257/default.htm

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Changes in MARC 21 Bibliographic Format 082,
083, 085

• 082 Dewey Decimal Classification Number (new
  subfields) http//www.loc.gov/marc/bibliographic/b
  d082.html
• 083 Additional Dewey Decimal Classification
  Number http//www.loc.gov/marc/bibliographic/bd083
  .html
• 085 Synthesized Classification Number Components
  http//www.loc.gov/marc/bibliographic/bd085.html

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082 Dewey Decimal Classification Number (new
subfields)

• m - Standard or optional designation (NR)
• a (standard)
• b (optional)
• q - Assigning agency (NR)
• Used with second indicator 4 (Assigned by agency
  other than LC)

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082 Dewey Decimal Classification Number (new
subfields) Example

• Feehan, Margaret, 1962-
• The serpents veil
• LCSH Canadian fiction20th century
• 082 00 a 813.54 2 22 m a
• 082 04 a C813.54 2 22 m b q CaOONL

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083 Additional Dewey Decimal Classification Number

• To be used for Dewey numbers, including internal
  and external table numbers, added for subject
  access

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083 Additional Dewey Decimal Classification
Number Example

• Historic villas of Lake Maggiore
• 082 00 a 728.80945165 2 22
• 083 04 a 728.80949478 2 22

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085 Synthesized Classification Number Components

• To show how a built Dewey number has been built
  and to specify the component elements

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085 Synthesized Classification Number Components
Example

• Artistic themes in literature
• 082 04 8 1 a 808.80357 2 22
• 085 8 1.1 b 808.80 a 808.801 c 808.303 z
  3C s 357

Artistic themes
Collections of literary texts from more
than two literatures displaying specific features
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WebDewey 2.0 Design Goals

• Modern interface
• Support for search, browse, number building, and
  personalization
• Generic user interface script to allow use of
  more than one language version and connection to
  terminology sets
• Local controls (links to terminology sets,
  display of hierarchy, connections to OPACs, etc.)

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Proposed Welcome Screen
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Proposed Advanced Search Screen
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Proposed Results Screen with Notes, Terms, and
Work Area
Search Browse Add User note
Add Institution Note Link to OPAC Help
Main Classes Tables More
Build number
(User created notes)
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Dewey Web Serviceshttp//dewey.info

• Experimental space for linked DDC data
• Initial linked data set DDC Summaries in 9
  languages  
• Features
• Classification semantics encoded in SKOS
• Actionable URIs for every DDC class
• Representations for humans (HTML) and machines
  (RDF)
• The linked data is available under a Creative
  Commons  BY-NC-ND license (more permissions are
  available here) 

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http//dewey.info/class/641/about/(human-readable
version)
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http//dewey.info/class/641/about.rdf(machine-rea
dable version)
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http//dewey.info/class/641/about.de