1 / 21

The lifespan, accessibility and archiving of dynamic documents.

The lifespan, accessibility and archiving of dynamic documents. K. Wegrzyn-Wolska katarzyna.wegrzyn@esigetel.fr ESIGETEL Ecole Sup é rieure d’Ing é nieurs en Informatique et G é nie des T é l é communications. ____________________________________________________

arnon
Download Presentation

The lifespan, accessibility and archiving of dynamic documents.

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The lifespan, accessibility and archiving of dynamic documents. K. Wegrzyn-Wolska katarzyna.wegrzyn@esigetel.fr ESIGETEL Ecole Supérieure d’Ingénieurs en Informatique et Génie des Télécommunications ____________________________________________________ OSWIR 2005 - Workshop on Open Source Web Information Retrieval in association with the 2005 IEEE/WIC/ACM International Conferences on Web Intelligence

  2. Presentation • Introduction • The Lifespan and Age of Dynamic Documents • Dynamic Document Categories • News published on the Web • Weblog sites • Search Engines • Archiving • Statistical Evaluation • Conclusions Katarzyna Wegrzyn-Wolska : Colloque EBSI-ENSSIB 2004

  3. Introduction • Some questions : • Real documents? • Temporary presentation of data? • Created automatically? • Created as a response to the users' questions? • HTML page with some dynamic parts? • (layers, scripts, etc.) • Created on-line by the Web server? Katarzyna Wegrzyn-Wolska : Colloque EBSI-ENSSIB 2004

  4. Dynamic documents categories • individual demands from the user : • Results from Search Engines, • Response from data forms, • etc. • automatically by specialised application : • different News sites, • forums, • etc. • different behaviour and characteristics Katarzyna Wegrzyn-Wolska : Colloque EBSI-ENSSIB 2004

  5. The Lifespan and Age of Dynamic Documents • Question : • How to evaluate the lifespan of dynamic documents? • documents disappear immediately from the computers’ memory after consultation • How to determine age of the dynamic documents? • http header Modified and Expired or the value fixed in HTML file with the META tag • Answer : • period where the response for the same questions doesn’t change • period it is the lifespan visible by the user Katarzyna Wegrzyn-Wolska : Colloque EBSI-ENSSIB 2004

  6. The Lifespan and Age of Dynamic Documents • News sites • Various informations • General sites, • World news • Local news, • Etc. • characteristics : • Automatically created, • Updated instantaneously, • Archiving Katarzyna Wegrzyn-Wolska : Colloque EBSI-ENSSIB 2004

  7. news url updating Archiving French Google http://news.google.fr ~20 min 30 days Google http://news.google.com ~20 min 30 days Voilà News http://actu.voila.fr/ 1 day 1 week Voila http://actu.voila.fr/Depeche/ (~30min) 1 week CNN http://www.cnn.com/ Yahoo!News http://fr.news.yahoo.com/ instantaneously 1 week TF1 news http://news.tf1.fr/news/ instantaneously News now http://www.newsnow.co.uk/ 5 min Les Infos http://www.lesinfos.com/ Since 2000 CategoryNet http://www.categorynet.com Every day Never ending CompanynewsGroup http://www.companynewsgroup.com 40 per day 2003 & 2004archived; 1999 – 2003 in a futur The Lifespan and Age of Dynamic Documents Katarzyna Wegrzyn-Wolska : Colloque EBSI-ENSSIB 2004

  8. The Lifespan and Age of Dynamic Documents • Weblogs: • Daily updated, • Form: • Web page modified, • Varied information, • General: • Dynamic pages • Regulary updated Katarzyna Wegrzyn-Wolska : Colloque EBSI-ENSSIB 2004

  9. The Lifespan and Age of Dynamic Documents • Search Engines : • response : • Dynamic pages • created on-line • Lifespan, accessibility : • period when the Search Engine's answer doesn’t change, • updating frequency of index-databases • Example : • Google : 4 weeks Katarzyna Wegrzyn-Wolska : Colloque EBSI-ENSSIB 2004

  10. Archiving • Question ? •  how to store (archive) the dynamics documents? • Solution : • simple : printed version • saved by the user • put into special caching and archiving systems • applications, which try to save up to date Web image • example : Wayback Machine Katarzyna Wegrzyn-Wolska : Colloque EBSI-ENSSIB 2004

  11. Archiving (Google News by WeybackMachine) Katarzyna Wegrzyn-Wolska : Colloque EBSI-ENSSIB 2004

  12. Archiving (ActuVoila by WeybackMachine) Katarzyna Wegrzyn-Wolska : Colloque EBSI-ENSSIB 2004

  13. Statistical evaluation • index-database updating frequency : • frequency analysis for the indexing robots visits used by Search Engines • statistic tests (news et Weblog sites) Katarzyna Wegrzyn-Wolska : Colloque EBSI-ENSSIB 2004

  14. Statistical evaluation • 4 categories of different sites : • Sportstrategiesthe sport news servicemodified very regular, • very regular News site,with a constant update time(every hour • BBC • broadcast on-line, • the lifespan is very irregular because the information is updated instantaneously , when available • TF1, • updated frequently during the day • no modifications during the night • Weblog (Slashdot.org) • changes here very quickly, new articles are broadcast very often • the current discussions continue incessantly • lifespan of these dynamically changed pages is extremely short  Katarzyna Wegrzyn-Wolska : Colloque EBSI-ENSSIB 2004

  15. Statistical evaluation News of JO 2004 at Athens broadcast by the site Sportstrategies  Katarzyna Wegrzyn-Wolska : Colloque EBSI-ENSSIB 2004

  16. Statistical evaluation BBC News  Katarzyna Wegrzyn-Wolska : Colloque EBSI-ENSSIB 2004

  17. Statistical evaluation TF1 News : 24/24  Katarzyna Wegrzyn-Wolska : Colloque EBSI-ENSSIB 2004

  18. The statistical evaluation TF1 News : working hours Katarzyna Wegrzyn-Wolska : Colloque EBSI-ENSSIB 2004

  19. The statistical evaluation Weblog Slashdot  Katarzyna Wegrzyn-Wolska : Colloque EBSI-ENSSIB 2004

  20. Tested service Lifespan mean min max Slashdot.org 77 sec 10 sec 22 min BBC.News 8,5 min 1 min 66 min TF1.news(24/24) 19,5 min 1 min 502 min TF1.news (working hours) 6,3 min 1 min 49 min Sportsynergies 56 min 9 min 61 min The statistical evaluation • Lifespan Comparison Katarzyna Wegrzyn-Wolska : Colloque EBSI-ENSSIB 2004

  21. Conclusion • Dynamic documents: • don’t exist in reality, • disappear from the computer memory directly after consultation. • real lifespan is very short • But… • Can be accessible for a long time and can be stored by special archiving systems • Management of the archived dynamic documents: • lifespan is identical to that of static documents, because the dynamic documents are stored in the same way as static ones. Katarzyna Wegrzyn-Wolska : Colloque EBSI-ENSSIB 2004

More Related