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Metadata is een netwerk
Een blik achter de schermen van het bibliografische
databeheer in Bibliotheekportalen
18 september 2015, Informatie aan zee
Lisbeth Vandoorne
Bibliotheekportalen
Unable to compute
Van welk werk zijn er het meeste
edities in BP ?
197
212
181
Welke records uit Vlacc hebben
bezit in alle bibliotheken?
Wie heeft er meer exemplaren in
de bib : Pascale Naessens of
Jeroen Meus ?
… en is dat veel ?
de voorkant is eenvoudig
de achterkant is ingewikkeld
28 databronnen
= 283 bibliotheken
12,3 miljoen bibliografische
records
Zonder artikels & tracks :
7,7 M bibliografische records
= 0,9 M Vlaccrecords en 6,8 M
‘lokale’ records
= 28 M exemplaren
Data verzamelen
12,3 M
7,7 M
= opsporen en samenvoegen van
‘gelijke’ records
Sleutels:
- Vlaccnummer
- ISBN + jaar
- EAN
Sleutel gelijk
= MATCH
= records samenvoegen
= MERGE
‘Matching’? ‘Merging’?
Waarom zijn er zoveel dubbels?
Veel kopieën van Vlaccrecords
[match op vlaccid]
Al heel veel dubbels
weggewerkt door PBSen
Vele ‘lokale’ beschrijvingen
worden later nog in
OpenVlacc beschreven
[match op andere sleutel]
.
vlaccid
77%
isbnyear
17%
ean
6%
Wat betekent dat voor de
presentatie ?
Start:
7,7 M records waarvan
6,8 M ‘lokale’ records
Na de matching / merging :
4,5 M ‘lokale’ records gematcht
op 0,9 M Vlaccrecords
0,3 M ‘lokale’ records matchen
op elkaar maar niet op vlacc
2 M lokale records zijn niet
gematcht
66%
5%
29%
Match op Vlaccrec
Match op ander
lokaal rec
Geen match
7,7 M = 2,9 M
databron
Matching
op vlacc %
vosselaar 94,4
kontich 93,1
obantwerpen 91,9
heist-op-den-berg 88,4
bidoc/vlaamsbrabant 87,2
bidoc/limburg 86,6
malle 86,2
pbsBrussel 82,4
bidoc/antwerpen 81,1
genk 79,7
pbsvlaamsbrabant 78,2
oboostende 74,5
obgent 71,3
pbsovinob 70,3
obbrugge 68,0
pbslimburg 67,6
pbsantwerpen 58,5
pbswinob 52,9
ALL =2014
databron
Matching
op Vlacc %
obantwerpen 96,5
vosselaar 91,6
obbrugge/catalog 91,4
bidoc/limburg 87,3
bidoc/vlaamsbrabant 86,8
bidoc/antwerpen 86,3
oboostende 81,8
obgent 80,2
heist-op-den-berg 79,1
kontich 78,7
pbsovinob 73,9
pbswinob 73,2
pbsvlaamsbrabant 73,0
pbsBrussel 72,3
pbslimburg 69,4
pbsantwerpen 69,1
malle 61,7
genk 59,6
ALL =2014
databron
Matching
op vlacc %
oba 100,0
vosselaar 99,9
obbrugge 99,5
malle 99,2
heist-op-den-berg 98,5
obgent 98,3
bidoc/limburg 98,3
kontich 97,6
bidoc/vlaamsbrabant 97,5
pbslimburg 96,2
genk 96,1
pbsbrussel 94,8
bidoc/antwerpen 94,4
oboostende 92,0
pbsvlaamsbrabant 86,1
pbsantwerpen 84,5
pbsovinob 81,4
pbswinob 76,4
databron
Matching
op vlacc %
oba 100,0
kontich 100,0
vosselaar 100,0
obgent 99,3
obbrugge 99,3
malle 96,6
bidoc/limburg 95,8
bidoc/vlaamsbrabant 94,3
heist-op-den-berg 93,2
pbsbrussel 88,5
pbsvlaamsbrabant 86,9
bidoc/antwerpen 86,7
oboostende 82,4
pbslimburg 80,5
pbswinob 75,2
pbsantwerpen 67,7
genk 65,6
pbsovinob 61,4
Sleutels (vlaccnr, isbn, ean, jaar)
corrigeren / aanvullen bij
bestaande records op basis van
rapporten
Verbetering matching:
wat kan jij doen?
Sleutels verzorgd invoeren bij
nieuwe records
Verbetering matching:
wat kan jij doen?
Verminderen lokaal werk:
wat kunnen wij doen?
OpenVlacc = centraal
bibliografisch bestand
Sneller en beter = lokaal werk
vermijden + betere presentatie
Steeds meer vraaggerichte invoer:
- obv bestellingen
- aanvullen precats in Vlacc
- games en DVDs obv cover
Niet: ALLES invoeren
Lisbeth.vandoorne@bibnet.be
www.anttilaitinen.com
locus + bibnet
upbottomdigitale focus

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Metadata is een netwerk

  • 1. Metadata is een netwerk Een blik achter de schermen van het bibliografische databeheer in Bibliotheekportalen 18 september 2015, Informatie aan zee Lisbeth Vandoorne
  • 3. Van welk werk zijn er het meeste edities in BP ? 197 212 181
  • 4. Welke records uit Vlacc hebben bezit in alle bibliotheken?
  • 5. Wie heeft er meer exemplaren in de bib : Pascale Naessens of Jeroen Meus ?
  • 6. … en is dat veel ?
  • 7. de voorkant is eenvoudig
  • 8.
  • 9. de achterkant is ingewikkeld
  • 10.
  • 11. 28 databronnen = 283 bibliotheken 12,3 miljoen bibliografische records Zonder artikels & tracks : 7,7 M bibliografische records = 0,9 M Vlaccrecords en 6,8 M ‘lokale’ records = 28 M exemplaren Data verzamelen 12,3 M 7,7 M
  • 12. = opsporen en samenvoegen van ‘gelijke’ records Sleutels: - Vlaccnummer - ISBN + jaar - EAN Sleutel gelijk = MATCH = records samenvoegen = MERGE ‘Matching’? ‘Merging’?
  • 13. Waarom zijn er zoveel dubbels? Veel kopieën van Vlaccrecords [match op vlaccid] Al heel veel dubbels weggewerkt door PBSen Vele ‘lokale’ beschrijvingen worden later nog in OpenVlacc beschreven [match op andere sleutel] . vlaccid 77% isbnyear 17% ean 6%
  • 14.
  • 15. Wat betekent dat voor de presentatie ? Start: 7,7 M records waarvan 6,8 M ‘lokale’ records Na de matching / merging : 4,5 M ‘lokale’ records gematcht op 0,9 M Vlaccrecords 0,3 M ‘lokale’ records matchen op elkaar maar niet op vlacc 2 M lokale records zijn niet gematcht 66% 5% 29% Match op Vlaccrec Match op ander lokaal rec Geen match 7,7 M = 2,9 M
  • 16. databron Matching op vlacc % vosselaar 94,4 kontich 93,1 obantwerpen 91,9 heist-op-den-berg 88,4 bidoc/vlaamsbrabant 87,2 bidoc/limburg 86,6 malle 86,2 pbsBrussel 82,4 bidoc/antwerpen 81,1 genk 79,7 pbsvlaamsbrabant 78,2 oboostende 74,5 obgent 71,3 pbsovinob 70,3 obbrugge 68,0 pbslimburg 67,6 pbsantwerpen 58,5 pbswinob 52,9 ALL =2014 databron Matching op Vlacc % obantwerpen 96,5 vosselaar 91,6 obbrugge/catalog 91,4 bidoc/limburg 87,3 bidoc/vlaamsbrabant 86,8 bidoc/antwerpen 86,3 oboostende 81,8 obgent 80,2 heist-op-den-berg 79,1 kontich 78,7 pbsovinob 73,9 pbswinob 73,2 pbsvlaamsbrabant 73,0 pbsBrussel 72,3 pbslimburg 69,4 pbsantwerpen 69,1 malle 61,7 genk 59,6
  • 17. ALL =2014 databron Matching op vlacc % oba 100,0 vosselaar 99,9 obbrugge 99,5 malle 99,2 heist-op-den-berg 98,5 obgent 98,3 bidoc/limburg 98,3 kontich 97,6 bidoc/vlaamsbrabant 97,5 pbslimburg 96,2 genk 96,1 pbsbrussel 94,8 bidoc/antwerpen 94,4 oboostende 92,0 pbsvlaamsbrabant 86,1 pbsantwerpen 84,5 pbsovinob 81,4 pbswinob 76,4 databron Matching op vlacc % oba 100,0 kontich 100,0 vosselaar 100,0 obgent 99,3 obbrugge 99,3 malle 96,6 bidoc/limburg 95,8 bidoc/vlaamsbrabant 94,3 heist-op-den-berg 93,2 pbsbrussel 88,5 pbsvlaamsbrabant 86,9 bidoc/antwerpen 86,7 oboostende 82,4 pbslimburg 80,5 pbswinob 75,2 pbsantwerpen 67,7 genk 65,6 pbsovinob 61,4
  • 18. Sleutels (vlaccnr, isbn, ean, jaar) corrigeren / aanvullen bij bestaande records op basis van rapporten Verbetering matching: wat kan jij doen?
  • 19. Sleutels verzorgd invoeren bij nieuwe records Verbetering matching: wat kan jij doen?
  • 20. Verminderen lokaal werk: wat kunnen wij doen? OpenVlacc = centraal bibliografisch bestand Sneller en beter = lokaal werk vermijden + betere presentatie Steeds meer vraaggerichte invoer: - obv bestellingen - aanvullen precats in Vlacc - games en DVDs obv cover Niet: ALLES invoeren