Improving the Quality of Web Archives through the Importance of Changes

Saâd, Myriam Ben; Gançarski, Stéphane

doi:10.1007/978-3-642-23088-2_29

Cited by 5 publications

(2 citation statements)

References 16 publications

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“…McCown and Nelson address coverage [17], but their research is limited to search engine caches. Ben Saad et al [5,4] address qualitative completeness through change detection to identify and archive important changes (rather than simply archiving every change). This research primarily addresses a priori completeness.…”

Section: Completeness (Coverage)mentioning

confidence: 99%

Evaluating sliding and sticky target policies by measuring temporal drift in acyclic walks through a web archive

Ainsworth

Nelson

2014

Int J Digit Libr

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When a user views an archived page using the archive's user interface (UI), the user selects a datetime to view from a list. The archived web page, if available, is then displayed. From this display, the web archive UI attempts to simulate the web browsing experience by smoothly transitioning between archived pages. During this process, the target datetime changes with each link followed; drifting away from the datetime originally selected. When browsing sparselyarchived pages, this nearly-silent drift can be many years in just a few clicks. We conducted 200,000 acyclic walks of archived pages, following up to 50 links per walk, comparing the results of two target datetime policies. The Sliding Target policy allows the target datetime to change as it does in archive UIs such as the Internet Archive's Wayback Machine. The Sticky Target policy, represented by the Memento API, keeps the target datetime the same throughout the walk. We found that the Sliding Target policy drift increases with the number of walk steps, number of domains visited, and choice (number of links available). However, the Sticky Target policy controls temporal drift, holding it to less than 30 days on average regardless of walk length or number of domains visited. The Sticky Target policy shows some increase as choice increases, but this may be caused by other factors. We conclude that based on walk length, the Sticky Target policy generally produces at least 30 days less drift than the Sliding Target policy.

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Section: Completeness (Coverage)mentioning

confidence: 99%

Evaluating sliding and sticky target policies by measuring temporal drift in acyclic walks through a web archive

Ainsworth

Nelson

2014

Int J Digit Libr

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“…Baeza-Yates et al [5] compared different strategies based on the available information about the crawling cycle (no-information, partial information, or all the information). Ben Saad and Gançarski [6,7] focused on adapting new crawling strategies to increase the quality of the web archive for completeness and coherence.…”

Section: Related Workmentioning

confidence: 99%

Archival HTTP redirection retrieval policies

AlSum

Nelson

Sanderson

et al. 2013

Proceedings of the 22nd International Conference on World Wide Web

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When retrieving archived copies of web resources (mementos) from web archives, the original resource's URI-R is typically used as the lookup key in the web archive. This is straightforward until the resource on the live web issues a redirect: R → R. Then it is not clear if R or R should be used as the lookup key to the web archive. In this paper, we report on a quantitative study to evaluate a set of policies to help the client discover the correct memento when faced with redirection. We studied the stability of 10,000 resources and found that 48% of the sample URIs tested were not stable, with respect to their status and redirection location. 27% of the resources were not perfectly reliable in terms of the number of mementos of successful responses over the total number of mementos, and 2% had a reliability score of less than 0.5. We tested two retrieval policies. The first policy covered the resources which currently issue redirects and successfully resolved 17 out of 77 URIs that did not have mementos of the original URI, but did of the resource that was being redirected to. The second policy covered archived copies with HTTP redirection and helped the client in 58% of the cases tested to discover the nearest memento to the requested datetime.

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Continuity and discontinuity in web archives: a multi-level reconstruction of the firsttuesday community through persistences, continuity spaces and web cernes

Lobbé

2023

Internet Histories

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Improving the Quality of Web Archives through the Importance of Changes

Cited by 5 publications

References 16 publications

Evaluating sliding and sticky target policies by measuring temporal drift in acyclic walks through a web archive

Evaluating sliding and sticky target policies by measuring temporal drift in acyclic walks through a web archive

Archival HTTP redirection retrieval policies

Continuity and discontinuity in web archives: a multi-level reconstruction of the firsttuesday community through persistences, continuity spaces and web cernes

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