VirtualInternationalAuthorityFile

ALA, June 2006

Richard Bennett OCLCChristel Hengel DDBThomas B. Hickey OCLCEdward T. O’Neill OCLCBarbara B. Tillett LC

VIAF

DDB/LC/OCLC

Virtual International Authority File

Link authority records from national bibliographic agencies

Build on their authority work Expand the concept of universal

bibliographic control• Allow national or regional variations in

authorized form to co-exist• Support needs for variations in preferred

language, script, and spelling

VIAF

DDB/LC/OCLC

Joint VIAF Project

VIAF

DDB/LC/OCLC

Semantic Web Building Blocks

End-user

A&I controlledvocabularies

(Library) authority files

Other controlled vocabularies

“Ontologies”

VIAF

DDB/LC/OCLC

Project Goal

Demonstrate feasibility of linking personal names across:

Personennormadatei (PND) Library of Congress Name Authority File (LCNAF)

VIAF

DDB/LC/OCLC

What is the VIAF?

System• Links between files• Web browser access• Multi-lingual and multi-scripts

Maintenance• National agencies control their records• Records harvested from national systems

Scalable• Any number of national authority files

VIAF

DDB/LC/OCLC

Matching Variations

In the LCNAF and PND authority files: Same name, same person Same name, different people Different names, same person Missing person in one file

VIAF

DDB/LC/OCLC

Two Different People – One Name

Adams, Mike PND: a golfer LCNAF: author of a Beatles collector's guide

Same NameDifferent

People

VIAF

DDB/LC/OCLC

One Person – Two Names

LCNAF: Morel, Pierre PND: Morellus, Petrus

Same PersonDifferent

Names

VIAF

DDB/LC/OCLC

Enhancing the Authorities

Bibliographic

Record

Derived Authorit

y

AuthorityRecord

Enhanced

Authority

VIAF

DDB/LC/OCLC

Mining the Bibliographic Record

LDR 00826ccm 2200289 a 4500 1 ocm10025532 5 20031229650847.0 8 840627s1982 nyuuua n eng 10 $a 84758340 40 $a DLC $c DLC 19 $a 17706440 20 $c $2.95 28 22 $a 48418 $b G. Schirmer 45 2 $b d198006 $b d198007 48 $b va01 $b ve01 $a ka01 50 00 $a M1529.3 $b .T100 1 $a Thomson, Virgil, $d 1896-245 14 $a The cat : $b duet for soprano and baritone / $c Virgil Thomson ; [words by Jack Larson].260 $a New York : $b G. Schirmer, $c c1982.300 $a 1 score (11 p.) ; $c 31 cm.500 $a For soprano, baritone, and piano.650 0 $a Vocal duets with piano.600 10 $a Larson, Jack $x Musical settings.700 1 $a Larson, Jack.

Authors

LC Control Number

LC ClassificationTitl

e

Material Type

Publisher

Place of Publication

Language

Date ofPublication

Usage

VIAF

DDB/LC/OCLC

Derived Authority Record

00525nz 2200229n 4500 0 1 xlc 1 1 3 OCoLC 2 5 20040721111415.0 3 8 040721nneanz||abbn n and d 4 40 $a OCoLC $b eng $c OCoLC $f viaf 5 100 1 $a Larson, Jack. 6 903 $a 84758340 7 910 14 $a the cat $b duet for soprano and baritone 8 921 $a g schirmer 9 922 $a nyu10 930 $a jack larson11 940 $a eng12 942 $a 23413 943 $a 198x14 944 $a cm15 950 1 $a thomson, virgil $d 1896

All text is normalizedSubjects are grouped

into broad subject areas

Material type is coded

Publication date is by decade

Coauthor

VIAF

DDB/LC/OCLC

Enhanced Authority Record

VIAF

DDB/LC/OCLC

Strong Matching Attributes

A work (title) in common Common control numbers (ISBN, ISSN, or LCCN) Exact birth and death year Joint authors Name as subject

VIAF

DDB/LC/OCLC

Weaker Attributes

Only one of birth/death date(s) (allows some variation) Subject area of works (two levels) Format (books, films, musical scores, etc.) Language Publisher Partial title match

Date of publication Country Role (author, illustrator, composer, etc.) Format (books, films, musical scores, etc.)

VIAF

DDB/LC/OCLC

LCNAF PND100 Menzel, Adoph, $d 1815-1905 400 Menzel, Adolph $d 1815-1905901 345816110 $9 1 901 345816110 $9 1910 friedrich def grosse und sien

fridenswerk $9 1910 friedrich def grosse und sien

fridenswerk $9 4921 bruckman $9 1 921 bruckman $9 8940 ger $9 27 940 ger $9 267941 ill $9 1 941 ill $9 18942 243 $9 7 942 243 $9 1943 184x $9 1 943 184x $9 2950 achenbach, sigrid $d 1944 $9 1 950 achenbach, sigrid $9 2951 hambuger kunstahalle $9 2 951 hambuger kunstahalle $9 1

Exact name match with datesStandard Number

Exact title matchPublisherLanguage

RoleSubject

DecadeJoint aughor

Corporate name

VIAF

DDB/LC/OCLC

LC Names

Established Names4,187,973

Names from Bib Records 3,440,706

UncontrolledNames883,882

OrphanedNames1,631,149

Active Establishe

d Names

2,556,824

VIAF

DDB/LC/OCLC

DDB Names

Established Names2,659,276

Names from Bib Records 2,319,829

Uncontrolled(Undif’d)Names306,211

OrphanedNames645,658

Active Establishe

d Names

2,013,618

VIAF

DDB/LC/OCLC

Results

Matches 558,618 Complex Matches 70,797 Unique Matches 487,821

VIAF

DDB/LC/OCLC

VIAF File

DDB Names2,659,276

LC Names 4,187,973

Common558,618(70% of

potential)

VIAF

DDB/LC/OCLC

Next Steps

Move to incremental updates Start harvesting national files Bring up Web interface (to full files) Make OAI accessible Bring in new participants Handle non-Roman matching

Move to other types of authorities• Corporate names• Geographic names• …

VIAF

DDB/LC/OCLC

Stage 3: Build OAI Server

LCNAF

DDB/PND

OAI

Server(s)

VIAF

DDB/LC/OCLC

Stage 4: Ongoing maintenance

VIAF

DDB/LC/OCLC

Stage 5: Build End User Interface with Unicode displays

User’s cookie specifies Hangul is preferred.Display 700 form, building on local system’s authority structure

Thank you

T. Hickeyhttp://errol.oclc.org/laf/n82-54463.html

ALA June 2006