Search engine implementations that index microformats across the web (i.e. not just on their own site).
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web search
General web search. Search engines that index websites in general using microformats.
Google.com supports rel-nofollow, hCard, hReview, hReview aggregate, hProduct (since 2009-05-12 for rich snippets), hCalendar (since 2010-01-22), hRecipe (since 2010-04-13) - in main search. See also related blog post on hCalendar hRecipe support and hMedia (since end of 2012).
Through additional interfaces Google supports rel-license ( Google Advanced Search - Usage rights), and XFN (e.g. rel=me support). See google-search for more details.
Microsoft
Microsoft's Bing.com supports hCard, hReview, hReview aggregate, hProduct, hCalendar, and hRecipe in main search, per Bing Help: Marking up your site: Overview.
Yandex
Yandex supports hCard, hRecipe, hReview, and hProduct([1]) and has a microformats validator as well. See yandex-search for more details.
previous search engines
Some search engines (or search engine backends) are no longer up and running, but when they were, they supported microformats:
Yahoo
PreviousYahoo search supports rel-nofollow. Through additional interfaces, Yahoo supports rel-license (Yahoo Creative Commons search) and hCard, hCalendar, hReview, XFN, geo, rel-tag, adr through Yahoo Search BOSS and Yahoo Search Monkey. See yahoo-search for more details.
VIREL
- VIREL (~2008-2010? http://virel.de/, site no longer does search as of 2011-222) indexes both hCard and hCalendar and provides a user interface (pop-up menu) to choose between searching contacts or events.
- 2008-09-09 Tag Edge: http://tagedge.com/2008/09/09/virel-microformats-search-engine/ (post permalink broken) Virel: Microformats Search Engine
socialsearchme
- singpolyma social web search (xfn, hCard) part of the diso project.
- memorable URL: http://socialsearchme.com/
- e.g. try a search for Jeremy
- 2008-08-19 DiSo Gets Search - blog post announcing it!
to do
- both
socialsearchme.com/?q=b
andsocialsearchme.com/b
should redirect/retrievescrape.singpolyma.net/profile/?q=b
.
previous blog search
Search blog posts and blogs in general. Search engines that specifically index blogs, blog posts, and other realtime sources on the web using microformats.
Technorati
- Technorati (rel-nofollow)
- Technorati Tag Search supports rel-tag (to search for blog posts tagged with rel-tag).
Technorati Kitchen
- Technorati Kitchen (~2006-2010? http://kitchen.technorati.com unavailable as of 2011-222)
IceRocket
- IceRocket through additional interfaces
- IceRocket Tag search support rel-tag (to search for blog posts tagged with rel-tag).
previous search results in microformats
Search engines that publish microformats in their results (but may not necessarily be indexing microformats).
Karniyarik
- Karniyarik Vertical Search Engine for Online Products (Stealth Beta was at http://www.karniyarik.com/karniyarik-web). Karniyarik's search results lists products and their vendors, which are marked up with hCard (e.g. search results for bebek bezi - diapers). In addition, Karniyarik's about page is marked up with hCard.