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Voyager tables and authority control Gary L. Strawn Northwestern University Library

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Presentation on theme: "Voyager tables and authority control Gary L. Strawn Northwestern University Library"— Presentation transcript:

1 Voyager tables and authority control Gary L. Strawn Northwestern University Library

2 Zip file lhttp://www.library.northwestern.edu public/Files/Helsinki2.ZIP lTodays PowerPoint lWritten-out version of talk lDetailed description of table structure

3 Introductory lExplanation of the way things work lNot justification, not criticism lI was not involved in the design! lReverse-engineering lTime is short today lAdditional information

4 From table to bib records Auth records Bib records Index

5 Tables lBIB_INDEX lAUTH_INDEX lBIB_TEXT lMFHD_MASTER lHEADING lSUBDIVISION

6 Today lTables that contain controlled headings lWhat goes into them lHow used in searching lAuthority control products

7 Types of indexes lNName (100, 700, etc.) lTTitle (730, 440, etc.) lEName-title (700, 800, etc.) lSSubject (600, 610, etc.) Listed in INDEX_TYPE table

8 Types of headings (selected) lN, E: p (personal name); c (corporate name) lT: t (series title); a (non-series title) lS: a (LCSH); c (MeSH) Listed in HEADING_TYPE table

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

10 Bibliographic 100 field l$a Paoli, Betty, $d lNormalized form: PAOLI BETTY lIndex type: N (Name) lHeading type: p (personal)

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

12 Bibliographic 100 field l$a Paoli, Betty, $d lNormalized form: PAOLI BETTY lIndex type: N (Name) lHeading type: p (personal)

13 Simple bibliographic record #3 lFields of interest: 100 (245)

14 Headings lWOZONIG KARIN S 1970 (N, p) lSONDERPUBLIKATIONEN … (T, t) lPAOLI BETTY (S, a) lAUTHORS AUSTRIAN 19TH CENTURY BIOGRAPHY (S, a)

15 So far we have 1.PAOLI … (N, p; 2 bib records) 2.WOZONIG … (N, p) 3.SONDERPUBLIKATIONEN (T, t) 4.PAOLI … (S, a) 5.AUTHORS … (S, a)

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

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

18 Simple authority record #1 lFields of interest: s l008/11: a (LCSH) l008/14: a (index type: N) l008/15: a (index type: S) l008/16: b (index type: T; but not here)

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

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

21 Reference type codes lA: established heading lS: see reference lA: earlier see also reference lB: later see also reference lG: broader see also reference Listed in REFERENCE_TYPE table

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

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

24 Bringing together headings

25 Search dialog corresponds to table structure

26 Paoli as name

27 Paoli as subject

28 Simple authority record lFields of interest: l008/11: a (LCSH) l008/14: a (T, a) l008/15: a (S, a) l008/16: a (T, t)

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

30 Searching implications

31 Name/title authority record lFields of interest: l008/11: a (LCSH) l008/14: a (index type: E) l008/15: a (index type: S) l008/16: b (none)

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

33 Name/title bibliographic heading

34 Bibliographic 100 plus 240 field l$a Paoli, Betty, $d $a Poems lNormalized form: PAOLI BETTY POEMS lIndex type: Name/title lHeading type: Personal lMatches #14

35 Name/title bibliographic heading

36 Bibliographic 100 plus 245 field l$a Paoli, Betty, $d $a Gedichte lNormalized form: PAOLI BETTY GEDICHTE lIndex type: Name/title lHeading type: Personal lMatches #16

37 Conflict and match

38 Reformulation for bibliographic lExtract one heading for each complete indexed field and field combination lIndex type depends on tag lHeading type depends on index type

39 Reformulation for authority lExtract one heading for each complete indexed field lOne copy of each heading for each a in 008/14-16, which determines index type lHeading type depends on index type

40 Characteristics lOne entry for each combination of: Normalized heading Index type Heading type lMatch implies linkage lWhole heading indexed

41 Questions that can be answered lWhich records contain a given heading? lWhich headings have the same stem? lHeadings with no authority records? lAre there duplicate authority records? lDo references conflict with bibliographic headings?

42 Subdivisions are different yet similar lBibliographic: each 6XX $v $x $y $z lAuthority: each 1XX, 4XX, 5XX $v $x $y $z lNo index type (all the same) lHeading type: 2nd indicator lSubdivision type: subfield code lAll of same subdivision collapse into one main table entry

43 Changed heading

44 Subdivision extraction l19TH CENTURY (a, y) lBIOGRAPHY (a, v)

45 Subdivision extraction lECONOMIC ASPECTS (a, x) lZIMBABWE (a, z) lZVIMBA COMMUNAL LAND (a, z) lCHIRAU COMMUNAL LAND (a, z)

46 Subdivision extraction lBIOGRAPHY (a, v; established) lAUTOBIOGRAPHY (a, v; reference) lCORRESPONDENCE REIMINSCENCES ETC (a, v; reference) lLEGENDS AND STORIES (a, v; reference)

47 Subdivision extraction lACTORS BIOGRAPHY (S, a; established) lBIOGRAPHY (a, v; not established)

48 Tables for subdivisions SUBDIVISION table AUTH_SUBDIV table BIB_SUBDIV table

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

50 Subdivision tables in searching

51

52 Indexing summary lHeading extraction lCoding lTable structure lUse in searching lUse in reports lDetails in ZIP file

53 Questions?


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