Memento Depot - Library of Congress Web Archive

Last updated: June 26, 2015

The Library of Congress Web Archive is made available by the Library of Congress . A description of the nature of the collection of this web archive is available via its home page.

The Library of Congress Web Archive is accessible via the Memento "Time Travel for the Web" protocol. Hence, it supports datetime negotiation to access a version of a web resource as it existed at a specific moment in time. Check out the brief introduction to Memento if you are not familiar with it.

Presuming the Original Resource (current version) is http://www.ssa.gov/, then the resources that are relevant for the Memento protocol are:

• TimeGate: http://webarchive.loc.gov/all/http://www.ssa.gov/
• Memento: http://webarchive.loc.gov/all/20120228213715/http://www.ssa.gov/ ; etc.
• TimeMap: http://webarchive.loc.gov/all/timemap/link/http://www.ssa.gov/

The original dataset is a collection of Mementos of a variety of web resources as described on the archive's home page. In responses to HTTP requests, the original resources don't provide a Link header with a "timegate" link to point at their TimeGate for the Library of Congress Web Archive.