1999-06-04 Kulturarw³ The Swedish WWW Archive Eller, att fånga den V ärlds V ida V även

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Kulturarw³ The Swedish WWW Archive Eller, att fånga den V ärlds V ida V även

Background Legal deposit, 1661 Latest revision 1993 –only electronic documents in fixed form –CD-ROM, diskettes New law under way –secretary from BIBSAM/KB –Proposal: SOU 1998:111 First Swedish web newspaper lost – printed newspapers 1645 Kulturarw 3 started summer 1996

Goals All www and gopher pages in Sweden –pictures, video etc –.se and generic TLD’s –suecana All articles in electronic journals All Swedish newsgroups / mailing lists Limitations versus RA and ALB

Organisation Project group: two persons Steering group: four persons Reference group: representatives from ALB, RA, Lund Univ, SUNET etc International cooperation –NWA - Nordic Web Archive –Nat. Libraries

Strategy Selection? How to know what is important? Labour intense Collect everything using automatic software Gets everything Less labour intense Computer memory is cheap

Strategy Take snapshots of the Swedish web a few times a year. In the future, take newspapers every day, others every month etc What is Sweden?.se.com,.org and.net with Swedish address/telephone number Swedish.nu (Niue) Suecana

Robot, Software Modified version of Nordic Web Index’s robot software (NetLab, Lunds univ.) Important! indexing is not archiving! Save data in MIME format Temporary storage, media: DLT-tape –Data rate, 5MB/s –Capacity, 20 GB –Durability, pass –Data integrity, error detection and correction –Low cost per GB stored –Access time too long (?)

Statistics 15 MURL (including duplicates) 240 Gbytes sites – se – com,.org,.net and.edu –~100 suecana –6 800 Niue Compare, legal deposit –Printed materiel: 1,7 km/year –The web: approx. 50 km on swedish web.

Statistics 363 different MIME types found. Many the same, some garbage. 7.0 M text/html 4.2 M image/gif 3.0 M image/jpeg 0.3 M text/plain 0.5 M others text/html + image/gif + image/jpeg + text/plain comprises 97% of the documents.

The Archive Goals –Create copies of the swedish web at several times (compare index services) –Surf the web in space and time –Search –Accessible in the future  migration

The Archive Disk (Optical disk) Magnetic tape HSM: Most data on magnetic tapes, staged to disk when needed

The Archive What are we archiving? –Magnetic tapes? –Bits and bytes ? –Intellectual content?