Microformats Wiki - User contributions [en]

rel-nofollow

2012-10-28T22:38:21Z

Mbutubuntu: /* examples in the wild */

<entry-title>rel="nofollow"</entry-title>
__TOC__
== Specification 2005-01-10 ==

=== Editors ===
* [http://tantek.com/ Tantek Çelik] ([http://technorati.com Technorati, Inc.])
* [http://epeus.blogspot.com/ Kevin Marks] ([http://technorati.com Technorati, Inc.])

=== Concept ===
* [http://www.google.com/googleblog/ Matt Cutts] ([http://google.com Google, Inc])
* [http://www.shellen.com/ Jason Shellen] ([http://www.blogger.com Blogger]/[http://www.google.com Google])

=== Copyright ===
{{MicroFormatCopyrightStatement2005}}
* [[User:Tantek|Tantek]]: I release all my contributions to this specification into the public domain and I encourage the other authors to do so as well.
* [[User:Kevin Marks|Kevin Marks]]: I release all my contributions to this specification into the public domain and I encourage the other authors to do so as well.
** When all authors/editors have done so, we can remove the MicroFormatCopyrightStatement template reference and replace it with the MicroFormatPublicDomainContributionStatement.

=== Patents ===
{{MicroFormatPatentStatement}}

== Abstract ==
<p class="entry-summary">RelNoFollow is an [[elemental-microformat|elemental microformat]], one of several [[microformats|microformat]] open standards. By adding <code>rel="nofollow"</code> to a hyperlink, a page indicates that the destination of that hyperlink {{should not}} be afforded any additional weight or ranking by user agents which perform link analysis upon web pages (e.g. search engines). Typical use cases include links created by 3rd party commenters on blogs, or links the author wishes to point to, but avoid endorsing. For more specific endorsement (or lack thereof) semantics, see [[vote-links|VoteLinks]].</p>

== XMDP profile ==
The following is an [http://gmpg.org/xmdp/ XMDP] profile for the [[rel-nofollow]] specification.

=== URLs ===
This profile is hosted as a separate XMDP file on microformats.org:
* http://microformats.org/profile/rel-nofollow
* shortURL: http://ufs.cc/x/rel-nofollow

=== Usage ===
Profiles are referenced in (X)HTML files in the <HEAD> tag, e.g.:
<source lang=html4strict>
<head profile='http://microformats.org/profile/rel-nofollow'>
</source>

=== Profile ===
<source lang=html4strict>
<dl class="profile">
<dt id="rel">rel</dt>
<dd><p>
<a rel="help" href="http://www.w3.org/TR/html401/struct/links.html#adef-rel">
HTML4 definition of the 'rel' attribute.</a>
Here is an additional value as defined in the
<a rel="help start" href="http://microformats.org/wiki/rel-nofollow">
rel-nofollow specification</a>
.</p>
<dl>
<dt id="nofollow">nofollow</dt>
<dd>Indicates that the referred resource was not necessarily linked to
by the author of the page, and thus said reference should not afford
the referred resource any additional weight or ranking by user agents.
</dd>
</dl>
</dd>
</dl>
</source>

== examples in the wild ==
This section is informative.
Note: There are numerous uses of rel-nofollow in the wild, this is very much an incomplete list. If your site marked up with rel-nofollow, feel free to add it to the top of this list. Once the list grows too big, we'll make a separate wiki page ([[rel-nofollow-examples-in-wild]]).
* [http://www.netd.it/sviluppo/ Netdesign Developers Network] uses the rel-nofollow attribute to make search engines don't follow the "off-topic" links.
* [http://funadvice.com FunAdvice] supports using the rel-nofollow tag to prevent users posting content simply for the search engine benefit, to improve the quality of the advice giving community.
* [http://www.cabs.co.za CABS Car hire South Africa] supports using the rel-nofollow tag to prevent inproper listings in the accommodation directory
* [http://petfoodtalk.com/dogfoodcoupons/ Dog Food Coupons] provides a dog food coupon collection service for dog owners. rel-nofollow is used to instruct search engine agents to '''not''' further execute link analysis and avoid endorsement of the actual merchant coupon links.

== bad examples in the wild ==
This section is informative.
There are now numerous abuses of rel-nofollow, in particular, where it is used on *2nd party* links, rather than the original intention of *3rd party* links such as in blog comments. The primary abusers of rel-nofollow are content hosting / social network sites.
* [http://flickr.com/ Flickr] puts "nofollow" on comments by the content publisher themselves (should only be on 3rd party comments), e.g. http://www.flickr.com/photos/tantek/2344425887/ as well as on profile links e.g. website: http://www.flickr.com/people/microformats/
* [http://twitter.com/ Twitter] puts "nofollow" on account holders' profile links, in the "description" and "web site" fields, e.g. http://twitter.com/indiewebcamp (links in posts do not have "nofollow" yet are wrapped with "t.co" URLs).
* ... nearly every other content hosting / publishing site - please add more specific examples with direct URLs to pages abusing "nofollow".

=== exceptions ===
It may seem odd to explicitly list *non* examples in an examples in the wild section, but such non-examples may be useful to help convince the bad examples in the wild to change their behavior:
* [http://blogspot.com/ Blogspot] does NOT put "nofollow" on content publisher links, e.g. http://epeus.blogspot.com/2012/03/when-youre-merchandise-not-customer.html
* [http://tumblr.com/ Tumblr] does NOT put "nofollow" on content publisher links, e.g. http://adactio.tumblr.com/post/27135731578/the-web-unusually-came-with-a-view-source
* ... (let's hope we find more such non-examples)

== normative references ==
* [http://gmpg.org/xmdp/ XMDP]
* http://googleblog.blogspot.com/2005/01/preventing-comment-spam.html

== informative references ==
* VoteLinks can be used by an author to explicitly state their support for or against, or neutrality toward the destination of a link. Implementers implementing rel="nofollow" and VoteLinks should similarly not afford any additional weight or ranking to links with either <code>rev="vote-abstain"</code> or <code>rev="vote-against"</code>.
* Contributed from http://developers.technorati.com/wiki/RelNoFollow

== open issues ==
These are open issues that have been raised about rel="nofollow" that have been raised in various forums, in particular, on the public [http://lists.w3.org/Archives/Public/www-html W3C www-html mailing list]. Once the list grows too big, we'll make a separate wiki page ([[rel-nofollow-issues]]). The issues have been grouped into four areas.

* '''Definition'''. nofollow indicates a behavior rather than a relationship from which the behavior should be inferred as appropriate for the useragent. rel values should be nouns that indicates what the resource being referenced is in relation to the source.
* '''Name'''. nofollow is a bad name.
** overloading. does not mean the same as robots exclusion standards (robots.txt, meta robots) nofollow.
** does not mean what it says. does not mean "do not follow this link", rather it means " do not add weight from this link". [http://www.w3.org/mid/opsk3cccj9lo81gp@quark Asbjørn Ulsberg]
** not a noun. see above.
** suggested alternatives:
*** noendorse - [http://lists.w3.org/Archives/Public/www-html/2005Jan/0046.html Micah Dubinko]
*** none
*** noweight
*** unendorsed - [http://lists.w3.org/Archives/Public/www-html/2005Jan/0057.html Lachlan Hunt]
*** unrelated - [http://lists.w3.org/Archives/Public/www-html/2005Jan/0049.html Jens Meiert]
*** untrusted
*** nonauth - [http://www.mnot.net/blog/2003/12/29/comment_spam_and_google Mark Baker]
*** norank - [http://www.digitalburg.com/ Ben Pierce]
* '''Efficacy'''. nofollow will not affect spamming behavior.
* '''Collateral Damage'''. If tools automatically add nofollow to all 3rd party links, then many legitimate non-spam links will be ignored or given reduced weight, and thus the destination of such links will be unfortunate casualties.

=== additional lists of issues ===
Additional lists of issues raised against rel="nofollow" can be found at the following site(s):
* http://www.nonofollow.net/
Matt Cutts Says No to Nofollow On Internal Links:
* http://www.techzene.com/seo/rel-nofollow-seo-disadvantages/

[[Category:Specifications]]
[[Category:rel-nofollow]]

== articles ==
When this section gets too big, we can move it to [[rel-nofollow-articles]].
* [http://searchenginewatch.com/3633972 2009-06-03 Search Engine Watch: Google Changes Course on Nofollow]
* [http://reference.sitepoint.com/html/rel-mf#rel__nofollow SitePoint reference: rel- Microformats / nofollow] by Ian Lloyd

rel-tag-examples-in-wild

2012-10-28T18:58:58Z

Mbutubuntu: /* new and uncategorized examples */

<entry-title>rel-tag Examples in the wild</entry-title>

This page is an '''informative''' section of the [[rel-tag|rel-tag specification]].

The following sites have published [[rel-tag|rel-tag]], and thus are a great place to start for anyone looking for examples "in the wild" for inspiration, or try parsing and indexing.

== new and uncategorized examples ==

* [http://picc.it Picc.it] uses rel-tag site-wide to markup links from pictures and albums back to their tag search pages. [http://picc.it/c/wallpapers/pictures/id/1246992/@_fountain_trafalger_square_lo Example Picture (Fountain, Trafalger Square, London)].
** '''Problematic.''' The example of "Trafalger Square" gets rel-tag wrong, and thus uses the tag "1" three times due to putting pagination (1) in the last segment of the URL.
* [http://sterlinghotels.com Sterling Hotels] uses rel-tag to mark up links to countries in search (look at country links on left) [http://sterlinghotels.com/search.aspx?hotelname=hotel Search for term hotel]
* [http://sterlingdesignhotels.com Sterling Design Hotels] uses rel-tag to mark up links to countries in search (look at country links on left) [http://sterlingdesignhotels.com/search.aspx?hotelname=hotel Search for term hotel]
* [http://www.blogspot.com Blogger by Google] uses rel-tag for post tags e.g. [http://analytics.blogspot.com Google Analytics Blog]
* [http://www.therecipedepository.com The Recipe Depository] uses rel-tag on all recipe pages to mark all the categories the recipes are filed under, e.g. [http://therecipedepository.com/recipe/662/spaghetti-with-tomatoespine-nutsand-arugula Spaghetti with Tomatoes, Pine Nuts, and Arugula]
* [http://www.linkedin.com LinkedIn] uses rel-tag throughout their pages.
* [http://www.amazon.com Amazon.com] now uses rel-tag on individual product pages allowing users to tag products with tags to help other users find products easier, e.g. [http://www.amazon.com/Febreze-Refresher-Antimicrobial-27-Ounce-Bottles/dp/B001D1YJKC/ref=wl_it_dp_o_npd?ie=UTF8&coliid=I1TJPD1T16WZ2W&colid=30JQN5R73GXZP Febreze Fabric Refresher, Antimicrobial, 27-Ounce Bottles (Pack of 6)]
* [http://trustafriend.com Trust a Friend] uses rel-tag for reviewed businesses in a city. For example: [http://trustafriend.com/reviews/le-gigot-cornelia-st-new-york-ny/ Le Gigot] has the tags: [http://trustafriend.com/us/newyork/french French] and [http://trustafriend.com/us/newyork/restaurant Restaurant].
* [http://en.newsgrail.com/ Newsgrail] uses rel-tag for an implementation of structured sematic tagging by [http://opencalais.com/ OpenCalais].
* [http://davidswain.co.uk Actor David Swain] uses rel-tag on all "tag" links on his site each pointing to its own tag-space.
* [http://beeets.com beeets] is a tag-based event search engine that uses rel-tag on all "tag" links, each pointing to its own tag-space.
* [http://www.beginrunning.com/ Begin Running] uses rel-tag on pages containing tagged content.
* [http://www.sunfactory.fr/en/ Sun Factory] uses rel-tag on some of its product pages. For example : [http://www.sunfactory.fr/en/personalized-gifts/statuette-trophy-soccer-player-football.html Trophy Soccer Player].
* [http://laibcoms.asia/blog/ Snow World] uses rel-tag on all "tag" links. As is built in [http://b2evolution.net b2evolution].
* [http://gameshogun.ws/ gameshogun™] uses rel-tag on all "tag" links. A [http://b2evolution.net b2evolution] implementation.
* [http://clothesonline.info ClothesOnline] uses rel-tag for categorizing shops and brands, for example: [http://clothesonline.info/brands/canada-goose Canada Goose].
* [http://huffduffer.com/ Huffduffer] uses rel-tag on every page, pointing to its own tag space e.g. http://huffduffer.com/tags/microformats
* [http://www.pantrymothtrap.com/ Pantry Moth Traps] implements the rel-tag in articles where an authoritative source is known. (for example in the article [http://www.pantrymothtrap.com/MothTrapsPick.html Moth Trap Picks] the tag [http://www.cleanertoday.com/tag/moth%20trap Moth Trap])
* [http://www.hightechcville.com/ HighTechCville] uses rel-tag on all the pages listing tagged content for [http://www.hightechcville.com/people people], [http://www.hightechcville.com/organizations organizations] and [http://www.hightechcville.com/events events] related to high tech in Charlottesville, VA.
* [http://skateboardspot.info skateboardspot.info] uses rel-tag in spotguide entries which are added to the site and categorized by the users (for example: [http://skateboardspot.info/cat/spotguide/action/view/id/1 “El Toro High School” spotguide entry]).
* [http://www.idoneos.com Idoneos.com] uses rel-tag for conceptual links to its own tag space, a collection of 'concepts' (mostly spanish).
* [http://www.professionalontheweb.com Professional On The Web] uses rel-tag for user entered tags which categorize web professionals and freelancers.
* [https://www.coderesort.com/p/epicode/wiki/CloudCuckoo CloudCuckoo] (secure site but open to all) an [http://www.episerver.com EPiServer] module distributed free by [http://www.interakting.co.uk Interakting], generates tag clouds with rel-tag links.
* [http://www.lifetime.com Lifetime.com] uses rel- and rev-tags in all content pages.
* [http://www.my-warehouse.de the my-Warehouse shopsystem] implements rel-tags in box headings and categories links.
* Joseph Bergantine uses tags to categorize [http://bergantinedesign.us/wallpaper/ wallpapers] and [http://bergantinedesign.us/blog/my-name-is-rachel-corrie blog posts]
* [http://www.codesignville.com Codesignville] uses rel-tag to indicate content categories.
* [http://www.bossalive.com BossaLive] uses rel-tag for tagging music. Publishes rel-tags for album, artist and genre.
** Also uses [[hcard|hCard]] on user profile pages.
* [http://www.qmpeople.com/ qmpeople] Uses rel-tag for translated tags into english, french and italian to meet new friends in different countries.
* [http://www.keevu.com Keevu.com] uses rel-tag to indicate content categories on most pages, like [http://www.keevu.com/venues venues]
* [http://www.amazingincredible.com Amazing Incredible] uses rel-tag on content pages
* [http://www.auctionlink.com.au AuctionLink] uses rel-tag on [http://www.auctionlink.com.au/TagList/Auctioneers/ Auction Sales Listings] tags.
** Could also use [[hcard|hCard]], e.g. on [http://www.auctionlink.com.au/Auctioneers/Auctioneer/Bonhams_Goodman_1/] [[User:AndyMabbett|Andy Mabbett]]
* Christian Hess uses rel-tag on his [http://www.hess-cr.com homepage blog] and several other pages of his site.
* [http://spacedust.atspace.com/ Spacedust] uses rel-tag to mark up gallery pages.
* [http://my.opera.com/dstorey/blog/ My Opera] uses rel-tag for tags on all user's blog entries.
* [http://dev.opera.com/articles/view/making-wii-friendly-pages/ Dev Opera] uses rel-tag on all article tags.
* [http://www.international.unt.edu UNT International] uses rel-tag to indicate content categories on most pages
* [http://yedda.com Yedda] - Yedda publishes rel-tags for all of the tags the people entered on themselves as well as on all tags entered on questions asked on Yedda.
* [http://www.lingr.com Lingr] publishes rel-tags for all user entered tags.
* [http://odeo.com ODEO] [http://odeo.com/blog/2005/07/adding-microformats-to-odeo.html publishes] rel-tags for user entered tags.
* [http://eventful.com Eventful] publishes rel-tags for user entered tags.
* [http://spinn3r.com Spinn3r] implements rel-tag as well as RSS and Atom subject and categories.
* [http://www.weboffate.com Web of Fate] publishes rel-tags for future predictions.
* [http://www.netd.it/sviluppo/ Netdesign] uses rel-tag for all blog posts.