Dear all,

A while ago, there was an interesting discussion on this list regarding the Memento proposal. The discussion is probably best summarized by referencing Pete Johnston's blog entry:

Following feedback from that discussion, and invaluable input received at a recent meeting with representatives from major web archives (see , we have made some revisions/rationalizations to the proposed framework.

The updated perspective is summarized in the slide deck at:

The major changes are:

(*) Use of a HTTP Link header instead of a HTTP 302 redirect to allow navigation from an Original Resource to a TimeGate for it. This solves a caching issue faced by the initial approach, and also allows applying the framework to non-information resources in order to allow retrieving their prior descriptions (see the final slides of the aforementioned slide deck). (*) Use of the same architecture (distinct Original Resource, TimeGate, Memento) for scenarios that involve Web archives and Content Management Systems as servers of Mementos.


Herbert Van de Sompel

Herbert Van de Sompel
Digital Library Research & Prototyping
Los Alamos National Laboratory, Research Library
tel. +1 505 667 1267

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