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1、Evaluating File Formats for Long-term PreservationCaroline van Wijk / Judith Rog, 12 October 2007, iPRES 2007Koninklijke Bibliotheek National Library of the NetherlandsEvaluating File Formats for Long-term PreservationOverview presentation Introduction National Library of the Netherlands (KB), digit
2、al archive e-Depot KB preservation policy, planning and strategies File format evaluation method Examples application of method Conclusion and discussionKoninklijke Bibliotheek National Library of the NetherlandsEvaluating File Formats for Long-term PreservationNational Library of the Netherlands (K
3、B) Founded in 1798 373 employees (december 2006) 3,5 million paper titles 10 million electronic publications Funded by the Ministry of Education, Culture and Science Deposit library since 1974; voluntary deposit, over 90% coverageKoninklijke Bibliotheek National Library of the NetherlandsEvaluating
4、File Formats for Long-term PreservationDigital archive: e-Depot Electronic version traditional depository Developed in collaboration with IBM Technical heart: DIAS based on OAIS Integrated with other library modules Operational since March 17, 2003 Main archival content: journal articlesKoninklijke
5、Bibliotheek National Library of the NetherlandsEvaluating File Formats for Long-term PreservationContent e-Depot Publications from large (inter)national publishers Articles mainly in PDF 1.0 to PDF 1.6 New projects, heterogeneous content:oDigital master files from digitisation projectsoPublications
6、from university repositoriesoWebsites from web archiving projectKoninklijke Bibliotheek National Library of the NetherlandsEvaluating File Formats for Long-term PreservationPreservation policy, planning and strategies KB archives publication (no editing necessary) Original files always kept Look ren
7、der publication in original environment and in current format Strategies; emulation and migration Choice file format; sustainability of the digital fileKoninklijke Bibliotheek National Library of the NetherlandsEvaluating File Formats for Long-term PreservationFile Format Evaluation Method Quantifia
8、ble: compare formats Evaluation method used for digitisation guidelines, publication guidelines Based on sustainability criteria from DP literature Each criterion is broken down in characteristics Criteria and characteristics are weighed Characteristics are assigned a value; threat to long-term pres
9、ervation or not?Koninklijke Bibliotheek National Library of the NetherlandsEvaluating File Formats for Long-term PreservationFile Format Evaluation Method - Criteria Openness Adoption Complexity Technical protection mechanism (DRM) Self-documentation Robustness DependenciesKoninklijke Bibliotheek Na
10、tional Library of the NetherlandsEvaluating File Formats for Long-term PreservationFile Format Evaluation Method - CharacteristicsOpenness: Standardisation Patents Reader with freely available sourceDependencies: Not dependent on specific hardware Not dependent on specific OS Not dependent on one sp
11、ecific reader Not dependent on other external resourcesKoninklijke Bibliotheek National Library of the NetherlandsEvaluating File Formats for Long-term PreservationFile Format Evaluation Method - Quantification Weighing: not all characteristics same importance Weighing: range from 1 to 7; 7 is most
12、important Values assigned: range from 0 to 2; 2 stands for best suitable for long-term preservation Final score ranges from 0 to 100; 100 stands for best suitable for long-term preservationKoninklijke Bibliotheek National Library of the NetherlandsEvaluating File Formats for Long-term PreservationFi
13、le Format Evaluation Method ImportanceOpenness24% Dependencies24% Adoption21% Complexity10% DRM10%Robustness7%Self documentation4%Koninklijke Bibliotheek National Library of the NetherlandsEvaluating File Formats for Long-term PreservationFile Format Evaluation Method PDF/A-1CharacteristicsWeightVal
14、ue scoresScoreStandardisation7222Total score14(7*2)/3=4.67 Patents7(7*2)/3=4.67Reader with freely available source7(7*2)/3=4.67Criterion OpennessKoninklijke Bibliotheek National Library of the NetherlandsEvaluating File Formats for Long-term PreservationFile Format Evaluation Method PDF/A-1CriteriaW
15、eightValue scoresTotal scoreOpenness (3)24%3*21*23*15*1,21*2 + 1*04*0 + 2*2 + 1*14*214Adoption (1)21%12Complexity (3)10%3DRM (5)10%6Self-documentation (2) 3,5%1Robustness (7)6,9%1,5Dependencies (4)24%14Normalised Score89Koninklijke Bibliotheek National Library of the NetherlandsEvaluating File Forma
16、ts for Long-term PreservationFile Format Evaluation Method MS Word 2003CharacteristicsWeightValue scoresTotal ScoreStandardisation70,500Total1,67(7*0,5)/3=1.67Patents7(7*0)/3=0Reader with freely available source7(7*0)/3=0Criterion OpennessKoninklijke Bibliotheek National Library of the NetherlandsEvaluating File Formats for Long-term Preserv
