Transcript DDC and BISAC: The Authority File, the Mappings and Opportunities

DDC and BISAC: The Authority File, the
Mappings and Opportunities
in a Linked Data World
Diane Vizine-Goetz
Senior Research Scientist, OCLC Research
Joan S. Mitchell
Editor in Chief, DDC
Michael Panzer
Assistant Editor, DDC
Publisher and Librarian Symposium
CQ Press, Washington, D.C.
June 29, 2010
OCLC BISAC Initiatives
• OCLC researchers and Dewey editors are collaborating
on a project to create authority records for BISAC
subject headings and add Dewey numbers to the records
• BISAC subject headings, including usage notes, are
coded according to the MARC 21 format for authority
data
• Dewey numbers from DDC 22, the latest edition of
Dewey, are applied to the records by the Dewey team
The Authority File and BISAC-DDC Mappings
• Base file = 2007 edition
• Manual & programmatic conversion
• Updated to reflect 2008 and 2009 additions and changes
• MARC21 Authority Format
• 3,672 Records (includes inactive codes)
• 7,449 DDC numbers (assigned by Dewey editors)
• 4,136 Usage notes
MARC21 Authority Format: BISAC Code
MARC21 Authority Format: BISAC Literal
Coding the Literal (1)
• MARC coding
• 150 __ $a COMPUTERS / Programming / Games
• 150 __ $a COMPUTERS $x Programming $x Games
• 150__$a COMPUTERS / Buyer's Guides
• 150__$a COMPUTERS $v Buyer's Guides
• 150__$a GARDENING / Regional / Canada
• 150__$a GARDENING $x Regional $z Canada
Coding the Literal (2)
• MARC coding
Topic
• 150 __ $a COMPUTERS / Programming / Games
• 150 __ $a COMPUTERS $x Programming $x Games
Form/genre
• 150__$a COMPUTERS / Buyer's Guides
• 150__$a COMPUTERS $v Buyer's Guides
Place
• 150__$a GARDENING / Regional / Canada
• 150__$a GARDENING $x Regional $z Canada
Cross references and related headings
Usage Notes (1)
Usage Notes (2)
Dewey Numbers: Mapping guidelines
• The topic represented by the subject heading
either equals/approximates the whole of or is
explicitly included in that number
• If the topic matches more than one Dewey number,
multiple numbers may be added
Examples
DDC: 1
083 04 152.47 $2 22 $5 OCoLC-D
150 __ SELF-HELP $x Anger Management
DDC: 2
083 04 372.7 ‡2 22 ‡5 OCoLC-D
083 04 510.712 ‡2 22 ‡5 OCoLC-D
150 __ EDUCATION ‡x Teaching Methods & Materials ‡x Mathematics
DDC: Many
150 __ BIOGRAPHY & AUTOBIOGRAPHY ‡x Rich & Famous
BISAC authority records in OCLC Research
Terminology Services (1)
• What it is:
• A suite of thesauri and controlled vocabularies provided by
OCLC Research as an experimental research service
• What it does:
• Provides search access to eight controlled vocabularies and
thesauri
• What you get:
• Concepts/headings in a controlled vocabulary
• Relationships for a concept/heading including equivalence,
hierarchical, and associative
BISAC authority records in OCLC Research
Terminology Services (2)
• Results in:
• A variety of formats (HTML, MADS, MARC XML, SKOS, and
Zthes)
• Who can use it:
• Anyone and everyone for noncommercial use
• Usage limits:
• None
• Query Protocols:
• SRU
OCLC Research Terminology Services
BISAC authority record (for machines)
BISAC authority record (for humans)
BISAC authority record browse (for humans)
The Dewey Ecosystem
Translations
Mappings
Linked Data
The two faces of Dewey
Organization side
Discovery side
Intrasystem relations across translations
Dewey translations
provide additional
terminology
Translations
Mappings and Crosswalks
SEARS
RAMEAU
SAO
CSH
BISAC
MeSH
SAB
DEWEY
LCSH
LCC
SWD
UDC
Nuovo
Soggettario
Linked data: Traditional identifiers to URIs
MARC:
082 00 ‡a 794.8 ‡2 22
http://dewey.info/class/794.8/
http://dewey.info/class/794.8/about.en
http://dewey.info/class/794.8/about.de
Library schemes
Industry
schemes
Linked data sets
Linked data sets: dewey.info
<http://dewey.info/>
• Experimental platform for linked DDC data
• Available now: Linked data version of the
DDC Summaries in eleven languages
• Features include:
• Actionable URIs for every class of the DDC Summaries
• Classification semantics encoded in SKOS
• Representations for machines and for humans
• Data is reusable under a Creative Commons BY-NC-ND license
HTML view across all versions in all languages
Data view across all versions in all languages
The Opportunities: Exploiting Relationships
between BISAC and Other Resources
Three use cases
Starting with:
1. Dewey number
2. BISAC heading
3. BISAC code
Classify
Visitors - Top Countries
United
States
United
Kingdom
Canada
Germany
Australia
Sweden
Ecuador
Luxembourg
France
Switzerland
Retrieve a record for a title
Acquire a Dewey number
Acquire BISAC terms based on Dewey number
Acquire BISAC terms based on Dewey
number
Dewey number: 794
Mapped BISAC terms to 794*
COMPUTERS—Programming—Games
GAMES—Board
GAMES—Board—Checkers
GAMES—Board—Chess
GAMES—Video—Electronic
...
Start with BISAC
BISAC headings
Using BISAC mapping to add context
Turning it around: specific BISAC heading
BISAC code in your metadata:
• CKB007000
Looking up literal and mapping:
• COOKING—Beverages—Beer —> 641.623
Deriving Dewey Summaries as broad subject description:
• http://dewey.info/class/641/about.en: Food & drink
• http://dewey.info/class/641/about.es: Alimentos y bebidas
• http://dewey.info/class/641/about.ar: ‫األغذية والمشروعات‬
BISAC literal + broad Dewey caption
Seeing Standards: A Visualization of the Metadata
Universe
http://www.dlib.indiana.edu/~jenlrile/metadatamap/
Selected Links
OCLC Research Terminology Web Services
• http://tspilot.oclc.org/resources/index.html
Classify
• http://classify.oclc.org/classify2/
Dewey.info
• http://dewey.info/