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The engine was initially given the name jughead, but then later renamed.  Unlike later search engines, like Aliweb, which attempt to index the web by crawling over the accessible content of web sites, W3 Catalog exploited the fact that many high-quality, manually maintained lists of web resources were already available. W3 Catalog simply mirrored these pages, reformatted the contents into individual entries, and provided a Perl-based front-end to enable dynamic querying.
W3 Catalog was retired on November 8, 1996.  In February 2010, the domain name w3catalog.com was acquired, and like the original index, each new website entry is manually reviewed before being added.
- Oscar Nierstrasz (2 September 1993). "Searchable Catalog of WWW Resources (experimental)".
- Oscar Nierstrasz (November 8, 1996) http://scg.unibe.ch/archive/software/w3catalog/W3CatalogHistory.html, Software Composition Group, Universität Bern accessed and retrieved April 18th, 2019
- "W3 Catalog History".
- Thomas R. Gruber, Sunil Vemuri and James Rice (December 1995). "Virtual documents that explain How Things Work: Dynamically generated question-answering documents". Knowledge Systems Laboratory, Stanford University.
- https://web.archive.org/web/20100424045228/http://www.w3catalog.com:80/ accessed 25th of October 2019
- https://www.w3catalog.com/ accessed 25th of October 2019
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