Voyager tables and authority control Gary L. Strawn Northwestern University Library mrsmith@northwestern.edu

Zip file http://www.library.northwestern.edu public/Files/Helsinki2.ZIP Today’s PowerPoint Written-out version of talk Detailed description of table structure

Introductory Explanation of the way things work Not justification, not criticism I was not involved in the design! Reverse-engineering Time is short today Additional information

From table to bib records Auth records Index Bib records

Tables BIB_INDEX AUTH_INDEX BIB_TEXT MFHD_MASTER HEADING SUBDIVISION

Today Tables that contain controlled headings What goes into them How used in searching Authority control products

Types of indexes N Name (100, 700, etc.) T Title (730, 440, etc.) E Name-title (700, 800, etc.) S Subject (600, 610, etc.) Listed in INDEX_TYPE table

Types of headings (selected) N, E: p (personal name); c (corporate name) T: t (series title); a (non-series title) S: a (LCSH); c (MeSH) Listed in HEADING_TYPE table

Simple bibliographic record #1 Fields of interest: 100 (240)

Bibliographic 100 field $a Paoli, Betty, $d 1814-1894. Normalized form: PAOLI BETTY 1814 1894 Index type: N (Name) Heading type: p (personal)

Simple bibliographic record #2 Fields of interest: 100 (245)

Bibliographic 100 field $a Paoli, Betty, $d 1814-1894. Normalized form: PAOLI BETTY 1814 1894 Index type: N (Name) Heading type: p (personal)

Simple bibliographic record #3 Fields of interest: 100 (245) 440 600 650

Headings WOZONIG KARIN S 1970 (N, p) SONDERPUBLIKATIONEN … (T, t) PAOLI BETTY 1814 1894 (S, a) AUTHORS AUSTRIAN 19TH CENTURY BIOGRAPHY (S, a)

So far we have PAOLI … (N, p; 2 bib records) WOZONIG … (N, p) SONDERPUBLIKATIONEN (T, t) PAOLI … (S, a) AUTHORS … (S, a)

Tables for bibliographic-derived headings HEADING table BIB_HEADING table Bib records

Tying headings to bibliographic records: BIB_HEADING table Heading 1 Bib 1 Heading 1 Bib 2 Heading 2 Bib 3 Heading 3 Bib 3 Heading 4 Bib 3 Heading 5 Bib 3

Simple authority record #1 Fields of interest: 100 400s 008/11: a (LCSH) 008/14: a (index type: N) 008/15: a (index type: S) 008/16: b (index type: T; but not here)

Index entries for this authority record 1. PAOLI BETTY 1814 1894 (N, p) 4. PAOLI BETTY 1814 1894 (S, a) 6-7. GLUCK BABETTE ELISABETH 1814 1894 (N, p and S, a) 8-9. GLUCK BARBARA ELISABETH 1814 1894 (N, p and S, a)

Tables for authority-derived headings HEADING table AUTH_HEADING table Auth records

Reference type codes A: established heading S: see reference A: ‘earlier’ see also reference B: ‘later’ see also reference G: ‘broader’ see also reference Listed in REFERENCE_TYPE table

Tying headings to authority records: AUTH_HEADING table Heading 1 Auth 1: established Heading 4 Auth 1: established Heading 6 Auth 1: see reference Heading 7 Auth 1: see reference Heading 8 Auth 1: see reference Heading 9 Auth 1: see reference

Tables for main headings HEADING table AUTH_HEADING table BIB_HEADING table Auth records Bib records

Bringing together headings

Search dialog corresponds to table structure

Paoli as name

Paoli as subject

Simple authority record Fields of interest: 130 410 008/11: a (LCSH) 008/14: a (T, a) 008/15: a (S, a) 008/16: a (T, t)

Index entries for this authority record 10-11, 3. SONDERPUBLIKATIONEN DER GRILLPARZER GESELLSCHAFT (3 entries: T, a; S, a; T, t) 12-13. GRILLPARZER GESELSCHAFT SONDERPUBLIKATIONEN DER GRILLPARZER GESELLSCHAFT (2 entries: E, c; S, a)

Searching implications

Name/title authority record Fields of interest: 100 400 008/11: a (LCSH) 008/14: a (index type: E) 008/15: a (index type: S) 008/16: b (none)

Index entries for this authority record 14. PAOLI BETTY 1814 1894 POEMS (E, p) 15. PAOLI BETTY 1814 1894 POEMS (S, a) 16. PAOLI BETTY 1814 1894 GEDICHTE (E, p) 17. PAOLI BETTY 1814 1894 GEDICHTE (S, a)

Name/title bibliographic heading

Bibliographic 100 plus 240 field $a Paoli, Betty, $d 1814-1894. $a Poems Normalized form: PAOLI BETTY 1814 1894 POEMS Index type: Name/title Heading type: Personal Matches #14

Name/title bibliographic heading

Bibliographic 100 plus 245 field $a Paoli, Betty, $d 1814-1894. $a Gedichte Normalized form: PAOLI BETTY 1814 1894 GEDICHTE Index type: Name/title Heading type: Personal Matches #16

Conflict and match

Reformulation for bibliographic Extract one heading for each complete indexed field and field combination Index type depends on tag Heading type depends on index type

Reformulation for authority Extract one heading for each complete indexed field One copy of each heading for each ‘a’ in 008/14-16, which determines index type Heading type depends on index type

Characteristics One entry for each combination of: Normalized heading Index type Heading type Match implies linkage Whole heading indexed

Questions that can be answered Which records contain a given heading? Which headings have the same stem? Headings with no authority records? Are there duplicate authority records? Do references conflict with bibliographic headings?

Subdivisions are different yet similar Bibliographic: each 6XX $v $x $y $z Authority: each 1XX, 4XX, 5XX $v $x $y $z No index type (all the same) Heading type: 2nd indicator Subdivision type: subfield code All of ‘same’ subdivision collapse into one main table entry

Changed heading

Subdivision extraction 19TH CENTURY (a, y) BIOGRAPHY (a, v)

Subdivision extraction ECONOMIC ASPECTS (a, x) ZIMBABWE (a, z) ZVIMBA COMMUNAL LAND (a, z) CHIRAU COMMUNAL LAND (a, z)

Subdivision extraction BIOGRAPHY (a, v; established) AUTOBIOGRAPHY (a, v; reference) CORRESPONDENCE REIMINSCENCES ETC (a, v; reference) LEGENDS AND STORIES (a, v; reference)

Subdivision extraction ACTORS BIOGRAPHY (S, a; established) BIOGRAPHY (a, v; not established)

Tables for subdivisions SUBDIVISION table AUTH_SUBDIV table BIB_SUBDIV table

More tables for subdivisions SUBDIVISION table AUTH_SUBDIV table SUBDIV_HEADING table BIB_SUBDIV table HEADING table

Subdivision tables in searching

Subdivision tables in searching

Indexing summary Heading extraction Coding Table structure Use in searching Use in reports Details in ZIP file

Questions?