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DDC Update:Formats, WebDewey 2.0, and Linked
Data
DDC Update:Formats, WebDewey 2.0, and Linked
Data
Joan S. MitchellEditor in Chief, DDC
OCLC
Dewey Translators MeetingIFLA 2009, Milan25 August 2009
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Changes in the Representation of the DDCChanges 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 FormatsChanges 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
Changes in MARC 21 Bibliographic Format: 082, 083, 085
• 082 Dewey Decimal Classification Number (new subfields) http://www.loc.gov/marc/bibliographic/bd082.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)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): Example082 Dewey Decimal Classification Number (new subfields): Example
Feehan, Margaret, 1962-
The serpent’s veil
LCSH: Canadian fiction—20th 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 Number083 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: Example083 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 Components085 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: Example085 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
Collections of literary texts from more than two literatures displaying specific features
Artistic themes
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WebDewey 2.0 Design GoalsWebDewey 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 ScreenProposed Welcome Screen
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Proposed Advanced Search ScreenProposed Advanced Search Screen
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Proposed Results Screen with Notes, Terms, and Work AreaProposed Results Screen with Notes, Terms, and Work Area
Main Classes Tables More
Build number
Search Browse Add User note Add Institution Note Link to OPACHelp
(User created notes)
Relative Index Mapped Terms
English LCSH
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Dewey Web Serviceshttp://dewey.infoDewey 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)http://dewey.info/class/641/about/(human-readable version)
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http://dewey.info/class/641/about.rdf(machine-readable version)http://dewey.info/class/641/about.rdf(machine-readable version)
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http://dewey.info/class/641/about.dehttp://dewey.info/class/641/about.de