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 DDC and BISAC: The Authority File, the Mappings and Opportunities in a Linked Data World

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 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 Topic Form/genre Place

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: $2 22 $5 OCoLC-D 150 __ SELF-HELP $x Anger Management DDC: ‡2 22 ‡5 OCoLC-D ‡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 sideDiscovery side

Intrasystem relations across translations Dewey translations provide additional terminology

Translations

Mappings and Crosswalks DEWEY LCSH MeSH SWD RAMEAU SAB BISAC SEARS CSH UDC LCC SAO Nuovo Soggettario

Linked data: Traditional identifiers to URIs MARC: ‡a ‡2 22 Library schemesIndustry schemes Linked data sets

Linked data sets: 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 United States United Kingdom Canada GermanyAustraliaSweden EcuadorLuxembourgFrance Switzerland Visitors - Top Countries

Retrieve a record for a title

Acquire a 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: CKB Looking up literal and mapping: COOKING—Beverages—Beer —> Deriving Dewey Summaries as broad subject description: Food & drink Alimentos y bebidas الأغذية والمشروعات

BISAC literal + broad Dewey caption

Seeing Standards: A Visualization of the Metadata Universe

Selected Links OCLC Research Terminology Web Services Classify Dewey.info