- From: Danny Ayers <danny.ayers@gmail.com>
- Date: Wed, 25 Nov 2009 07:30:37 +0100
- To: Herbert Van de Sompel <hvdsomp@gmail.com>
- Cc: Richard Cyganiak <richard@cyganiak.de>, Chris Bizer <chris@bizer.de>, Georgi Kobilarov <georgi.kobilarov@gmx.de>, Michael Hausenblas <michael.hausenblas@deri.org>, Linked Data community <public-lod@w3.org>, "Michael L. Nelson" <mln@cs.odu.edu>, Robert Sanderson <azaroth42@gmail.com>
Good man, I couldn't help thinking there was a paper in that... 2009/11/22 Herbert Van de Sompel <hvdsomp@gmail.com>: > hi all, > (thanks Chris, Richard, Danny) > > In light of the current discussion, I would like to provide some > clarifications regarding "Memento: Time Travel for the Web", ie the idea of > introducing HTTP content negotiation in the datetime dimension: > (*) Some extra pointers: > - For those who prefer browsing slides over reading a paper, there is > http://www.slideshare.net/hvdsomp/memento-time-travel-for-the-web > - Around mid next week, a video recording of a presentation I gave on > Memento should be available at http://www.oclc.org/research/dss/default.htm > - The Memento site is at http://www.mementoweb.org. Of special interest may > be the proposed HTTP interactions for (a) web servers with internal archival > capabilities such as content management systems, version control systems, > etc (http://www.mementoweb.org/guide/http/local/) and (b) web servers > without internal archival capabilities > (http://www.mementoweb.org/guide/http/remote/). > (*) The overall motivation for the work is the integration of archived > resources into regular web navigation by making them available via their > original URIs. The archived resources we have focused on in our experiments > so far are those kept by > (a) Web Archives such as the Internet Archive, Webcite, archive-it.org and > (b) Content Management Systems such as wikis, CVS, ... > The reason I pinged Chris Bizer about our work is that we thought that our > proposed approach could also be of interest in the LoD environment. > Specifically, the ability to get to prior descriptions of LoD resources by > doing datetime content negotiation on their URI seemed appealing; e.g. what > was the dbpedia description for the City of Paris on March 20 2008? This > ability would, for example, allow analysis of (the evolution of ) data over > time. The requirement that is currently being discussed in this thread > (which I interpret to be about approaches to selectively get updates for a > certain LoD database) is not one I had considered using Memento for, > thinking this was more in the realm of feed technologies such as Atom (as > suggested by Ed Summers), or the pre-REST OAI-PMH > (http://www.openarchives.org/OAI/openarchivesprotocol.html). > (*) Regarding some issues that were brought up in the discussion so far: > - We use an X header because that seems to be best practice when doing > experimental work. We would very much like to eventually migrate to a real > header, e.g. Accept-Datetime. > - We are definitely considering and interested in some way to formalize our > proposal in a specification document. We felt that the I-D/RFC path would > have been the appropriate one, but are obviously open to other approaches. > - As suggested by Richard, there is a bootstrapping problem, as there is > with many new paradigms that are introduced. I trust LoD developers fully > understand this problem. Actually, the problem is not only at the browser > level but also at the server level. We are currently working on a FireFox > plug-in that, when ready, will be available through the regular channels. > And we have successfully (and experimentally) modified the Mozilla code > itself to be able to demonstrate the approach. We are very interested in > getting support in other browsers, natively or via plug-ins. We also have > some tools available to help with initial deployment > (http://www.mementoweb.org/tools/ ). One is a plug-in for the mediawiki > platform; when installed the wiki natively supports datetime content > negotiation and redirects a client to the history page that was active at > the datetime requested in the X-Accept-Header. We just started a Google > group for developers interested in making Memento happen for their web > servers, content management system, etc. > (http://groups.google.com/group/memento-dev/). > (*) Note that the proposed solution also leverages the OAI-ORE specification > (fully compliant with LoD best practice) as a mechanism to support discovery > of archived resources. > I hope this helps to get a better understanding of what Memento is about, > and what its current status is. Let me end by stating that we would very > much like to get these ideas broadly adopted. And we understand we will need > a lot of help to make that happen. > Cheers > Herbert > == > Herbert Van de Sompel > Digital Library Research & Prototyping > Los Alamos National Laboratory, Research Library > http://public.lanl.gov/herbertv/ > tel. +1 505 667 1267 > > > > > -- http://danny.ayers.name
Received on Wednesday, 25 November 2009 06:31:10 UTC