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DDC Update: Formats, WebDewey 2.0, and Linked Data

Learn about the latest changes in the MARC 21 formats and the DDC distribution, conversion to MARCXML, and classification semantics for linked data.

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DDC Update: Formats, WebDewey 2.0, and Linked Data

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  1. DDC Update:Formats, WebDewey 2.0, and Linked Data Joan S. Mitchell Editor in Chief, DDC OCLC Dewey Translators Meeting IFLA 2009, Milan 25 August 2009

  2. 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

  3. 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 2009http://www.oclc.org/support/documentation/worldcat/tb/257/default.htm

  4. 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

  5. 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)

  6. 082 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

  7. 083 Additional Dewey Decimal Classification Number To be used for Dewey numbers, including internal and external table numbers, added for subject access

  8. 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

  9. 085 Synthesized Classification Number Components To show how a built Dewey number has been built and to specify the component elements

  10. 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

  11. 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.)

  12. Proposed Welcome Screen

  13. Proposed Advanced Search Screen

  14. 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)

  15. 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) 

  16. http://dewey.info/class/641/about/(human-readable version)

  17. http://dewey.info/class/641/about.rdf(machine-readable version)

  18. http://dewey.info/class/641/about.de

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