The document introduces Memento, a framework that integrates past and present versions of web resources to enable time travel on the web. Memento achieves this through linking between original resources and their archived past versions, as well as between versions. This allows navigation between versions through standard HTTP requests. The framework has tools for both clients and servers and aims to preserve important parts of our cultural record that would otherwise be lost as web pages change and disappear over time.

1. Time Travel for the Web Herbert Van de Sompel @hvdsomp http://public.lanl.gov/herbertv/ Michael L. Nelson Robert Sanderson Lyudmila Balakireva Harihar Shankar Scott Ainsworth Winner of the 2010 Digital Preservation Award http://mementoweb.org/

2. An important part of the future Web is its past.

3. The Web has become a major carrier of our cultural record.

4. But the Web has a bad case of amnesia.

6. http://demorgen.be Dec 10 2010 18:34:11 GMT http://demorgen.be Dec 11 2010 14:48:11 GMT

7. Significant parts of our cultural record become inaccessible.

8. The Good News: Pockets of the Past Web exist.

10. Web Archives;

11. Transactional archives;

13. The Bad News: Navigating the Past Web sucks.

14. Finding Past Resource Versions Go to http://www.archive.org/and search http://cnn.com Onhttp://web.archive.org/web/*/http://cnn.com, select desired datetime

15. Finding Past Resource Versions Go to http://en.wikipedia.org/wiki/September_11_attacks and click History Browse History

16. Dec 20 2001, 4:51:00 UTC current Navigating Past Resource Versions Pentagon http://en.wikipedia.org/w/index.php?title=September_11_attacks&oldid=282333 archived resource for http://en.wikipedia.org/wiki/September_11_attacks http://en.wikipedia.org/wiki/The_Pentagon

17. Sep 11 2001, 21:38:55 UTC Sep 11 2001, 20:36:10 UTC Navigating Past Resource Versions SPACE http://web.archive.org/web/20010911213855/www.cnn.com/TECH/space/ http://web.archive.org/web/20010911203610/http://www.cnn.com/ archived resource for http://cnn.com

18. Memento wants to make it easy to access the Web of the Past.

19. Tate Online Today Select Date March 16 2008 Tate Online March 16 2008 From National Archives

20. Memento achieves this by technically integrating the present Web and the past Web.

22. A bridge between present and past: link and content negotiation;

24. bridge from present to past

25. bridge from past to present

26. memento

27. original resource provides no link

28. client – server interaction

29. original resource gone

30. original resource’s server gone

31. multiple archives

32. Memento Time Travel is real fun. Try it! Download the FireFox plug-in.

33. Memento Time Travel is really powerful. Time-Series via HTTP follow-your-nose.

34. memento

35. memento Original Resource: http://lanlsource.lanl.gov/pics/picoftheday.png

36. Time Travel across Versions of a Picture of the Day Data collected through HTTP Navigation

37. memento Original Resource: http://dbpedia.org/resource/France

38. Time-Series Analysis across DBpedia Versions Data collected through HTTP Navigation

39. Memento standardization started via the IETF. First public comment was from Tim Berners-Lee.

40. https://datatracker.ietf.org/doc/draft-vandesompel-memento/

41. Memento tools are emerging. Both client-side and server-side.

42. http://mementoweb.org/tools/

43. If you agree the Web’s Past is important to its Future: support Memento!

44. Blog, Tweet, Share, Like, implement, deploy. Slap a Memento sticker on your laptop.

45. Time Travel for the Web Herbert Van de Sompel @hvdsomp http://public.lanl.gov/herbertv/ Michael L. Nelson Robert Sanderson Lyudmila Balakireva Harihar Shankar Scott Ainsworth Winner of the 2010 Digital Preservation Award http://mementoweb.org/