rel="nofollow"

(Difference between revisions)

Jump to: navigation, search
m (Reverted edits by 766nj57 (Talk) to last version by TomMorris)
Line 1: Line 1:
-
HOW THING OUT
+
<entry-title>rel="nofollow"</entry-title>
-
HOW ANYTHING OUT
+
__TOC__
-
HOW EVERYTHING OUT
+
== Specification 2005-01-10 ==
-
HOW UNIVERSE OUT
+
 
-
HOW MAKE THING OUT
+
=== Editors ===
-
HOW MAKE ANYTHING OUT
+
* [http://tantek.com/ Tantek Çelik] ([http://technorati.com Technorati, Inc.])
-
HOW MAKE EVERYTHING OUT
+
* [http://epeus.blogspot.com/ Kevin Marks] ([http://technorati.com Technorati, Inc.])
-
HOW MAKE UNIVERSE OUT
+
 
-
HOW THING BE OUT
+
=== Concept ===
-
HOW ANYTHING BE OUT
+
* [http://www.google.com/googleblog/ Matt Cutts] ([http://google.com Google, Inc])
-
HOW EVERYTHING BE OUT
+
* [http://www.shellen.com/ Jason Shellen] ([http://www.blogger.com Blogger]/[http://www.google.com Google])
-
HOW UNIVERSE BE OUT
+
 
-
HOW MAKE THING BE OUT
+
=== Copyright ===
-
HOW MAKE ANYTHING BE OUT
+
{{MicroFormatCopyrightStatement2005}}
-
HOW MAKE EVERYTHING BE OUT
+
* [[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.
-
HOW MAKE UNIVERSE BE OUT
+
* [[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.
-
HOW THING OUT
+
** When all authors/editors have done so, we can remove the MicroFormatCopyrightStatement template reference and replace it with the MicroFormatPublicDomainContributionStatement.
-
HOW ANYTHING OUT
+
 
-
HOW EVERYTHING OUT
+
=== Patents ===
-
HOW UNIVERSE OUT
+
{{MicroFormatPatentStatement}}
-
HOW MAKE THING OUT
+
 
-
HOW MAKE ANYTHING OUT
+
== Abstract ==
-
HOW MAKE EVERYTHING OUT
+
<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>
-
HOW MAKE UNIVERSE OUT
+
 
-
HOW THING BE OUT
+
== XMDP profile ==
-
HOW ANYTHING BE OUT
+
The following is an [http://gmpg.org/xmdp/ XMDP] profile for the [[rel-nofollow]] specification.
-
HOW EVERYTHING BE OUT
+
 
-
HOW UNIVERSE BE OUT
+
=== URLs ===
-
HOW MAKE THING BE OUT
+
This profile is hosted as a separate XMDP file on microformats.org:
-
HOW MAKE ANYTHING BE OUT
+
* http://microformats.org/profile/rel-nofollow
-
HOW MAKE EVERYTHING BE OUT
+
* shortURL: http://ufs.cc/x/rel-nofollow
-
HOW MAKE UNIVERSE BE OUT
+
 
-
HOW THING OUT
+
=== Usage ===
-
HOW ANYTHING OUT
+
Profiles are referenced in (X)HTML files in the &lt;HEAD&gt; tag, e.g.:
-
HOW EVERYTHING OUT
+
<source lang=html4strict>
-
HOW UNIVERSE OUT
+
<head profile='http://microformats.org/profile/rel-nofollow'>
-
HOW MAKE THING OUT
+
</source>
-
HOW MAKE ANYTHING OUT
+
 
-
HOW MAKE EVERYTHING OUT
+
=== Profile ===
-
HOW MAKE UNIVERSE OUT
+
<source lang=html4strict>
-
HOW THING BE OUT
+
<dl class="profile">
-
HOW ANYTHING BE OUT
+
<dt id="rel">rel</dt>
-
HOW EVERYTHING BE OUT
+
<dd><p>
-
HOW UNIVERSE BE OUT
+
  <a rel="help" href="http://www.w3.org/TR/html401/struct/links.html#adef-rel">
-
HOW MAKE THING BE OUT
+
    HTML4 definition of the 'rel' attribute.</a> 
-
HOW MAKE ANYTHING BE OUT
+
  Here is an additional value as defined in the
-
HOW MAKE EVERYTHING BE OUT
+
  <a rel="help start" href="http://microformats.org/wiki/rel-nofollow">
-
HOW MAKE UNIVERSE BE OUT
+
  rel-nofollow specification</a>
-
HOW THING OUT
+
  .</p>
-
HOW ANYTHING OUT
+
  <dl>
-
HOW EVERYTHING OUT
+
  <dt id="nofollow">nofollow</dt>
-
HOW UNIVERSE OUT
+
  <dd>Indicates that the referred resource was not necessarily linked to
-
HOW MAKE THING OUT
+
      by the author of the page, and thus said reference should not afford
-
HOW MAKE ANYTHING OUT
+
      the referred resource any additional weight or ranking by user agents.
-
HOW MAKE EVERYTHING OUT
+
  </dd>
-
HOW MAKE UNIVERSE OUT
+
  </dl>
-
HOW THING BE OUT
+
</dd>
-
HOW ANYTHING BE OUT
+
</dl>
-
HOW EVERYTHING BE OUT
+
</source>
-
HOW UNIVERSE BE OUT
+
 
-
HOW MAKE THING BE OUT
+
== examples in the wild ==
-
HOW MAKE ANYTHING BE OUT
+
This section is informative.
-
HOW MAKE EVERYTHING BE OUT
+
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]]).
-
HOW MAKE UNIVERSE BE OUT
+
* [http://www.netd.it/sviluppo/ Netdesign Developers Network] uses the rel-nofollow attribute to make search engines don't follow the "off-topic" links.
-
HOW THING OUT
+
* [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.
-
HOW ANYTHING OUT
+
* [http://www.cabs.co.za CABS Car hire South Africa] supports using the rel-nofollow tag to prevent inproper listings in the accommodation directory
-
HOW EVERYTHING OUT
+
* [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.
-
HOW UNIVERSE OUT
+
* [http://petmoz.com/dogfoodcoupons Pet Food Coupons] While listing coupons in our Dog Food Coupons section why use the rel-nofollow tag to make sure that search engines specifically Google do not follow any links we believe have no value to the visitor. 
-
HOW MAKE THING OUT
+
 
-
HOW MAKE ANYTHING OUT
+
== bad examples in the wild ==
-
HOW MAKE EVERYTHING OUT
+
This section is informative.
-
HOW MAKE UNIVERSE OUT
+
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.
-
HOW THING BE OUT
+
* [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/
-
HOW ANYTHING BE OUT
+
* [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).
-
HOW EVERYTHING BE OUT
+
* ... nearly every other content hosting / publishing site - please add more specific examples with direct URLs to pages abusing "nofollow".
-
HOW UNIVERSE BE OUT
+
 
-
HOW MAKE THING BE OUT
+
=== exceptions ===
-
HOW MAKE ANYTHING BE OUT
+
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:
-
HOW MAKE EVERYTHING BE OUT
+
* [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
-
HOW MAKE UNIVERSE BE OUT
+
* [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
-
HOW THING OUT
+
* ... (let's hope we find more such non-examples)
-
HOW ANYTHING OUT
+
 
-
HOW EVERYTHING OUT
+
== normative references ==
-
HOW UNIVERSE OUT
+
* [http://gmpg.org/xmdp/ XMDP]
-
HOW MAKE THING OUT
+
* http://googleblog.blogspot.com/2005/01/preventing-comment-spam.html
-
HOW MAKE ANYTHING OUT
+
 
-
HOW MAKE EVERYTHING OUT
+
== informative references ==
-
HOW MAKE UNIVERSE OUT
+
* 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>.
-
HOW THING BE OUT
+
* Contributed from http://developers.technorati.com/wiki/RelNoFollow
-
HOW ANYTHING BE OUT
+
 
-
HOW EVERYTHING BE OUT
+
== open issues ==
-
HOW UNIVERSE BE OUT
+
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.
-
HOW MAKE THING BE OUT
+
 
-
HOW MAKE ANYTHING BE OUT
+
* '''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.
-
HOW MAKE EVERYTHING BE OUT
+
* '''Name'''. nofollow is a bad name.
-
HOW MAKE UNIVERSE BE OUT
+
** overloading. does not mean the same as robots exclusion standards (robots.txt, meta robots) nofollow.
-
HOW THING OUT
+
** 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]
-
HOW ANYTHING OUT
+
** not a noun. see above.
-
HOW EVERYTHING OUT
+
** suggested alternatives:
-
HOW UNIVERSE OUT
+
*** noendorse - [http://lists.w3.org/Archives/Public/www-html/2005Jan/0046.html Micah Dubinko]
-
HOW MAKE THING OUT
+
*** none
-
HOW MAKE ANYTHING OUT
+
*** noweight
-
HOW MAKE EVERYTHING OUT
+
*** unendorsed - [http://lists.w3.org/Archives/Public/www-html/2005Jan/0057.html Lachlan Hunt]
-
HOW MAKE UNIVERSE OUT
+
*** unrelated - [http://lists.w3.org/Archives/Public/www-html/2005Jan/0049.html Jens Meiert]
-
HOW THING BE OUT
+
*** untrusted
-
HOW ANYTHING BE OUT
+
*** nonauth - [http://www.mnot.net/blog/2003/12/29/comment_spam_and_google Mark Baker]
-
HOW EVERYTHING BE OUT
+
*** norank - [http://www.digitalburg.com/ Ben Pierce]
-
HOW UNIVERSE BE OUT
+
* '''Efficacy'''.  nofollow will not affect spamming behavior.
-
HOW MAKE THING BE OUT
+
* '''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.
-
HOW MAKE ANYTHING BE OUT
+
 
-
HOW MAKE EVERYTHING BE OUT
+
=== additional lists of issues ===
-
HOW MAKE UNIVERSE BE OUT
+
Additional lists of issues raised against rel="nofollow" can be found at the following site(s):
-
HOW THING OUT
+
* http://www.nonofollow.net/
-
HOW ANYTHING OUT
+
Matt Cutts Says No to Nofollow On Internal Links:
-
HOW EVERYTHING OUT
+
* http://www.techzene.com/seo/rel-nofollow-seo-disadvantages/
-
HOW UNIVERSE OUT
+
 
-
HOW MAKE THING OUT
+
[[Category:Specifications]]
-
HOW MAKE ANYTHING OUT
+
[[Category:rel-nofollow]]
-
HOW MAKE EVERYTHING OUT
+
 
-
HOW MAKE UNIVERSE OUT
+
== articles ==
-
HOW THING BE OUT
+
When this section gets too big, we can move it to [[rel-nofollow-articles]].
-
HOW ANYTHING BE OUT
+
* [http://searchenginewatch.com/3633972 2009-06-03 Search Engine Watch: Google Changes Course on Nofollow]
-
HOW EVERYTHING BE OUT
+
* [http://reference.sitepoint.com/html/rel-mf#rel__nofollow SitePoint reference: rel- Microformats / nofollow] by Ian Lloyd
-
HOW UNIVERSE BE OUT
+
-
HOW MAKE THING BE OUT
+
-
HOW MAKE ANYTHING BE OUT
+
-
HOW MAKE EVERYTHING BE OUT
+
-
HOW MAKE UNIVERSE BE OUT
+
-
HOW THING OUT
+
-
HOW ANYTHING OUT
+
-
HOW EVERYTHING OUT
+
-
HOW UNIVERSE OUT
+
-
HOW MAKE THING OUT
+
-
HOW MAKE ANYTHING OUT
+
-
HOW MAKE EVERYTHING OUT
+
-
HOW MAKE UNIVERSE OUT
+
-
HOW THING BE OUT
+
-
HOW ANYTHING BE OUT
+
-
HOW EVERYTHING BE OUT
+
-
HOW UNIVERSE BE OUT
+
-
HOW MAKE THING BE OUT
+
-
HOW MAKE ANYTHING BE OUT
+
-
HOW MAKE EVERYTHING BE OUT
+
-
HOW MAKE UNIVERSE BE OUT
+
-
HOW THING OUT
+
-
HOW ANYTHING OUT
+
-
HOW EVERYTHING OUT
+
-
HOW UNIVERSE OUT
+
-
HOW MAKE THING OUT
+
-
HOW MAKE ANYTHING OUT
+
-
HOW MAKE EVERYTHING OUT
+
-
HOW MAKE UNIVERSE OUT
+
-
HOW THING BE OUT
+
-
HOW ANYTHING BE OUT
+
-
HOW EVERYTHING BE OUT
+
-
HOW UNIVERSE BE OUT
+
-
HOW MAKE THING BE OUT
+
-
HOW MAKE ANYTHING BE OUT
+
-
HOW MAKE EVERYTHING BE OUT
+
-
HOW MAKE UNIVERSE BE OUT
+
-
HOW THING OUT
+
-
HOW ANYTHING OUT
+
-
HOW EVERYTHING OUT
+
-
HOW UNIVERSE OUT
+
-
HOW MAKE THING OUT
+
-
HOW MAKE ANYTHING OUT
+
-
HOW MAKE EVERYTHING OUT
+
-
HOW MAKE UNIVERSE OUT
+
-
HOW THING BE OUT
+
-
HOW ANYTHING BE OUT
+
-
HOW EVERYTHING BE OUT
+
-
HOW UNIVERSE BE OUT
+
-
HOW MAKE THING BE OUT
+
-
HOW MAKE ANYTHING BE OUT
+
-
HOW MAKE EVERYTHING BE OUT
+
-
HOW MAKE UNIVERSE BE OUT
+
-
HOW THING OUT
+
-
HOW ANYTHING OUT
+
-
HOW EVERYTHING OUT
+
-
HOW UNIVERSE OUT
+
-
HOW MAKE THING OUT
+
-
HOW MAKE ANYTHING OUT
+
-
HOW MAKE EVERYTHING OUT
+
-
HOW MAKE UNIVERSE OUT
+
-
HOW THING BE OUT
+
-
HOW ANYTHING BE OUT
+
-
HOW EVERYTHING BE OUT
+
-
HOW UNIVERSE BE OUT
+
-
HOW MAKE THING BE OUT
+
-
HOW MAKE ANYTHING BE OUT
+
-
HOW MAKE EVERYTHING BE OUT
+
-
HOW MAKE UNIVERSE BE OUT
+
-
HOW THING OUT
+
-
HOW ANYTHING OUT
+
-
HOW EVERYTHING OUT
+
-
HOW UNIVERSE OUT
+
-
HOW MAKE THING OUT
+
-
HOW MAKE ANYTHING OUT
+
-
HOW MAKE EVERYTHING OUT
+
-
HOW MAKE UNIVERSE OUT
+
-
HOW THING BE OUT
+
-
HOW ANYTHING BE OUT
+
-
HOW EVERYTHING BE OUT
+
-
HOW UNIVERSE BE OUT
+
-
HOW MAKE THING BE OUT
+
-
HOW MAKE ANYTHING BE OUT
+
-
HOW MAKE EVERYTHING BE OUT
+
-
HOW MAKE UNIVERSE BE OUT
+
-
HOW THING OUT
+
-
HOW ANYTHING OUT
+
-
HOW EVERYTHING OUT
+
-
HOW UNIVERSE OUT
+
-
HOW MAKE THING OUT
+
-
HOW MAKE ANYTHING OUT
+
-
HOW MAKE EVERYTHING OUT
+
-
HOW MAKE UNIVERSE OUT
+
-
HOW THING BE OUT
+
-
HOW ANYTHING BE OUT
+
-
HOW EVERYTHING BE OUT
+
-
HOW UNIVERSE BE OUT
+
-
HOW MAKE THING BE OUT
+
-
HOW MAKE ANYTHING BE OUT
+
-
HOW MAKE EVERYTHING BE OUT
+
-
HOW MAKE UNIVERSE BE OUT
+
-
HOW THING OUT
+
-
HOW ANYTHING OUT
+
-
HOW EVERYTHING OUT
+
-
HOW UNIVERSE OUT
+
-
HOW MAKE THING OUT
+
-
HOW MAKE ANYTHING OUT
+
-
HOW MAKE EVERYTHING OUT
+
-
HOW MAKE UNIVERSE OUT
+
-
HOW THING BE OUT
+
-
HOW ANYTHING BE OUT
+
-
HOW EVERYTHING BE OUT
+
-
HOW UNIVERSE BE OUT
+
-
HOW MAKE THING BE OUT
+
-
HOW MAKE ANYTHING BE OUT
+
-
HOW MAKE EVERYTHING BE OUT
+
-
HOW MAKE UNIVERSE BE OUT
+
-
HOW THING OUT
+
-
HOW ANYTHING OUT
+
-
HOW EVERYTHING OUT
+
-
HOW UNIVERSE OUT
+
-
HOW MAKE THING OUT
+
-
HOW MAKE ANYTHING OUT
+
-
HOW MAKE EVERYTHING OUT
+
-
HOW MAKE UNIVERSE OUT
+
-
HOW THING BE OUT
+
-
HOW ANYTHING BE OUT
+
-
HOW EVERYTHING BE OUT
+
-
HOW UNIVERSE BE OUT
+
-
HOW MAKE THING BE OUT
+
-
HOW MAKE ANYTHING BE OUT
+
-
HOW MAKE EVERYTHING BE OUT
+
-
HOW MAKE UNIVERSE BE OUT
+
-
HOW THING OUT
+
-
HOW ANYTHING OUT
+
-
HOW EVERYTHING OUT
+
-
HOW UNIVERSE OUT
+
-
HOW MAKE THING OUT
+
-
HOW MAKE ANYTHING OUT
+
-
HOW MAKE EVERYTHING OUT
+
-
HOW MAKE UNIVERSE OUT
+
-
HOW THING BE OUT
+
-
HOW ANYTHING BE OUT
+
-
HOW EVERYTHING BE OUT
+
-
HOW UNIVERSE BE OUT
+
-
HOW MAKE THING BE OUT
+
-
HOW MAKE ANYTHING BE OUT
+
-
HOW MAKE EVERYTHING BE OUT
+
-
HOW MAKE UNIVERSE BE OUT
+
-
HOW THING OUT
+
-
HOW ANYTHING OUT
+
-
HOW EVERYTHING OUT
+
-
HOW UNIVERSE OUT
+
-
HOW MAKE THING OUT
+
-
HOW MAKE ANYTHING OUT
+
-
HOW MAKE EVERYTHING OUT
+
-
HOW MAKE UNIVERSE OUT
+
-
HOW THING BE OUT
+
-
HOW ANYTHING BE OUT
+
-
HOW EVERYTHING BE OUT
+
-
HOW UNIVERSE BE OUT
+
-
HOW MAKE THING BE OUT
+
-
HOW MAKE ANYTHING BE OUT
+
-
HOW MAKE EVERYTHING BE OUT
+
-
HOW MAKE UNIVERSE BE OUT
+
-
HOW THING OUT
+
-
HOW ANYTHING OUT
+
-
HOW EVERYTHING OUT
+
-
HOW UNIVERSE OUT
+
-
HOW MAKE THING OUT
+
-
HOW MAKE ANYTHING OUT
+
-
HOW MAKE EVERYTHING OUT
+
-
HOW MAKE UNIVERSE OUT
+
-
HOW THING BE OUT
+
-
HOW ANYTHING BE OUT
+
-
HOW EVERYTHING BE OUT
+
-
HOW UNIVERSE BE OUT
+
-
HOW MAKE THING BE OUT
+
-
HOW MAKE ANYTHING BE OUT
+
-
HOW MAKE EVERYTHING BE OUT
+
-
HOW MAKE UNIVERSE BE OUT
+
-
HOW THING OUT
+
-
HOW ANYTHING OUT
+
-
HOW EVERYTHING OUT
+
-
HOW UNIVERSE OUT
+
-
HOW MAKE THING OUT
+
-
HOW MAKE ANYTHING OUT
+
-
HOW MAKE EVERYTHING OUT
+
-
HOW MAKE UNIVERSE OUT
+
-
HOW THING BE OUT
+
-
HOW ANYTHING BE OUT
+
-
HOW EVERYTHING BE OUT
+
-
HOW UNIVERSE BE OUT
+
-
HOW MAKE THING BE OUT
+
-
HOW MAKE ANYTHING BE OUT
+
-
HOW MAKE EVERYTHING BE OUT
+
-
HOW MAKE UNIVERSE BE OUT
+
-
HOW THING OUT
+
-
HOW ANYTHING OUT
+
-
HOW EVERYTHING OUT
+
-
HOW UNIVERSE OUT
+
-
HOW MAKE THING OUT
+
-
HOW MAKE ANYTHING OUT
+
-
HOW MAKE EVERYTHING OUT
+
-
HOW MAKE UNIVERSE OUT
+
-
HOW THING BE OUT
+
-
HOW ANYTHING BE OUT
+
-
HOW EVERYTHING BE OUT
+
-
HOW UNIVERSE BE OUT
+
-
HOW MAKE THING BE OUT
+
-
HOW MAKE ANYTHING BE OUT
+
-
HOW MAKE EVERYTHING BE OUT
+
-
HOW MAKE UNIVERSE BE OUT
+
-
HOW THING OUT
+
-
HOW ANYTHING OUT
+
-
HOW EVERYTHING OUT
+
-
HOW UNIVERSE OUT
+
-
HOW MAKE THING OUT
+
-
HOW MAKE ANYTHING OUT
+
-
HOW MAKE EVERYTHING OUT
+
-
HOW MAKE UNIVERSE OUT
+
-
HOW THING BE OUT
+
-
HOW ANYTHING BE OUT
+
-
HOW EVERYTHING BE OUT
+
-
HOW UNIVERSE BE OUT
+
-
HOW MAKE THING BE OUT
+
-
HOW MAKE ANYTHING BE OUT
+
-
HOW MAKE EVERYTHING BE OUT
+
-
HOW MAKE UNIVERSE BE OUT
+

Revision as of 06:52, 20 August 2013

Contents

Specification 2005-01-10

Editors

Concept

Copyright

This specification is (C) 2005-2019 by the authors. However, the authors intend to submit (or already have submitted, see details in the spec) this specification to a standards body with a liberal copyright/licensing policy such as the GMPG, IETF, and/or W3C. Anyone wishing to contribute should read their copyright principles, policies and licenses (e.g. the GMPG Principles) and agree to them, including licensing of all contributions under all required licenses (e.g. CC-by 1.0 and later), before contributing.

Patents

This specification is subject to a royalty free patent policy, e.g. per the W3C Patent Policy, and IETF RFC3667 & RFC3668.

Abstract

RelNoFollow is an elemental microformat, one of several microformat open standards. By adding rel="nofollow" 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 VoteLinks.

XMDP profile

The following is an XMDP profile for the rel-nofollow specification.

URLs

This profile is hosted as a separate XMDP file on microformats.org:

Usage

Profiles are referenced in (X)HTML files in the <HEAD> tag, e.g.:

<head profile='http://microformats.org/profile/rel-nofollow'>

Profile

<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>

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).

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.

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:

normative references

informative references

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 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.

additional lists of issues

Additional lists of issues raised against rel="nofollow" can be found at the following site(s):

Matt Cutts Says No to Nofollow On Internal Links:

articles

When this section gets too big, we can move it to rel-nofollow-articles.

Categories

rel="nofollow" was last modified: Wednesday, December 31st, 1969

Views