DDC Update: Formats, WebDewey 2'0, and Linked Data

1
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

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 2009
  http//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/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

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 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

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-rea
dable version)
18
http//dewey.info/class/641/about.de