Virtual International Authority File ALA, June 2006 Richard BennettOCLC Christel HengelDDB Thomas B. HickeyOCLC Edward T. ONeillOCLC Barbara B. TillettLC

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 controlled vocabularies (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 Name Different People

VIAF DDB/LC/OCLC One Person – Two Names LCNAF: Morel, Pierre PND: Morellus, Petrus Same Person Different Names

VIAF DDB/LC/OCLC Enhancing the Authorities Bibliographic Record Derived Authority Record Enhanced Authority

VIAF DDB/LC/OCLC Mining the Bibliographic Record LDR 00826ccm a ocm s1982 nyuuua n eng 10 $a $a DLC $c DLC 19 $a $c $ $a $b G. Schirmer 45 2 $b d $b d $b va01 $b ve01 $a ka $a M $b.T $a Thomson, Virgil, $d $a The cat : $b duet for soprano and baritone / $c Virgil Thomson ; [words by Jack Larson]. 260 $a New York : $b G. Schirmer, $c c $a 1 score (11 p.) ; $c 31 cm. 500 $a For soprano, baritone, and piano $a Vocal duets with piano $a Larson, Jack $x Musical settings $a Larson, Jack. Authors LC Control Number LC Classification Title Material Type Publisher Place of Publication Language Date of Publication Usage

VIAF DDB/LC/OCLC Derived Authority Record 00525nz n xlc OCoLC nneanz||abbn n and d 4 40 $a OCoLC $b eng $c OCoLC $f viaf $a Larson, Jack $a $a the cat $b duet for soprano and baritone $a g schirmer $a nyu $a jack larson $a eng $a $a 198x $a cm $a thomson, virgil $d 1896 All text is normalized Subjects are grouped into broad subject areas Material type is codedPublication 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 LCNAFPND 100Menzel, Adoph, $d Menzel, Adolph $d $ $ friedrich def grosse und sien fridenswerk $ friedrich def grosse und sien fridenswerk $ bruckman $9 1921bruckman $ ger $ ger $ ill $9 1941ill $ $ $ x $ x $ achenbach, sigrid $d 1944 $9 1950achenbach, sigrid $ hambuger kunstahalle $9 2951hambuger kunstahalle $9 1 Exact name match with dates Standard Number Exact title match PublisherLanguageRoleSubjectDecadeJoint aughorCorporate name

VIAF DDB/LC/OCLC LC Names Established Names 4,187,973 Names from Bib Records 3,440,706 Uncontrolled Names 883,882 Orphaned Names 1,631,149 Active Established Names 2,556,824

VIAF DDB/LC/OCLC DDB Names Established Names 2,659,276 Names from Bib Records 2,319,829 Uncontrolled (Undifd) Names 306,211 Orphaned Names 645,658 Active Established 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 Names 2,659,276 LC Names 4,187,973 Common 558,618 (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 Users cookie specifies Hangul is preferred. Display 700 form, building on local systems authority structure

Thank you T. Hickey html ALA June 2006