rel-shortlink

2009-08-25T07:50:06Z

Yanivg: /* examples in the wild */ Added Yedda.com reference

<entry-title>rel="shortlink"</entry-title>
__TOC__
== Specification 2009-05-04 ==

=== Editors ===
* [http://samj.net/ Sam Johnston] ([http://www.aos.net.au/ Australian Online Solutions])

=== Concept ===
* [http://samj.net/ Sam Johnston] ([http://www.aos.net.au/ Australian Online Solutions])
* [http://shiflett.org/ Chris Shiflett] ([http://omniti.com/ OmniTI]) rev=canonical
* [http://laughingmeme.org/ Kellan Elliott-McCrae] ([http://flickr.com Flickr]) rev=canonical
* [http://twitter.com/robspychala Robert Spychala] ([http://snaplog.com/ Snaplog]) rel=shorturl

=== Copyright ===
{{MicroFormatPublicDomainContributionStatement}}

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

== Abstract ==
<p class="entry-summary">RelShortLink is a brainstorm proposal with the goal of becoming an [[elemental-microformat|elemental microformat]]. '''The problem-space that rel-shortlink is attempting to solve must be first taken through the microformats [[process]] before any specific brainstorm can be properly evaluated, and potentially added as a microformat.''' Proposed usage: by adding <code>rel="shortlink"</code> to a [hyper]link, a page indicates that the hyperlink may be used for space constrained and/or manual entry (e.g. printed or spoken) applications and that the destination of that hyperlink carries the same meaning (even if formatting such as sort order and hightlighting is lost). Typical use cases include pasting links into microblogging services such as Twitter and anywhere manual entry is required (e.g. printed or spoken URLs).</p>

== XMDP profile ==
<pre><nowiki>
<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.</p>
<dl>
<dt id="shortlink">shortlink</dt>
<dd>Indicates that the referred resource carries the same meaning as the
referring page (even if formatting such as sort order and highlighting
is lost) and that the link may be used for space constrained and/or
manual entry (e.g. printed or spoken) applications.</dd>
</dl>
</dd>
</dl>
</nowiki></pre>

== examples in the wild ==
This section is informative.
Note: There are numerous uses of rel-shortlink in the wild, this is very much an incomplete list. If your site marked up with rel-shortlink, 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-shortlink-examples-in-wild]]).
* [http://wordpress.com/ WordPress.com] uses it on ~7 million blogs with their [http://en.blog.wordpress.com/2009/08/14/shorten/ WP.me URL shortening service].
* [http://rel-shortlink.appspot.com RelShortLink] is an open source Python implementation hosted on [http://appengine.google.com Google App Engine] which scans both HTTP headers and HTML links for <code>rel=shortlink</code>.
* [http://wordpress.org/extend/plugins/shortlink/ Wordpress 'shortlink' plugin] embeds <code>rel=shortlink</code> links into Wordpress blogs.
* [http://yedda.com/ Yedda.com] (an AOL company), uses it on all question pages with their internal short URLs mechanism.

== normative references ==
* [http://gmpg.org/xmdp/ XMDP]
* [http://purl.org/net/shortlink shortlink Specification]

== informative references ==
* [http://code.google.com/p/shortlink/ Google Code 'shortlink' project]
* [http://samj.net/2009/04/introducing-relshort-better-alternative.html Introducing rel="shortlink" - a better alternative to URL shorteners]
* [http://samj.net/2009/04/relshortlink-url-shortening-that-really.html rel=shortlink: url shortening that really doesn't hurt the Internet]
* [http://www.ietf.org/mail-archive/web/apps-discuss/current/msg00531.html rel="shortlink" proposal for advertising short URLs in HTML/HTTP] thread on IETF apps-discuss

== inferior alternatives ==
* [http://revcanonical.appspot.com/ RevCanonical]
** <code>rev=</code> deprecated in HTML 5
** <code>rev=</code> is easily confused with <code>rel=</code>, thus creating extreme danger for clueless webmasters
** implies that referring URL is the canonical URL, thus should only be used for the canonical URL itself
** implies that a complete list of referring URLs is offered, when in fact there are infinite possibilities
** See also mnot's [http://www.mnot.net/blog/2009/04/14/rev_canonical_bad Counting the ways that rev="canonical" hurts the Web]
* RelShortcut
** Scorched earth thanks to "shortcut icon" (now just "icon" in HTML 5) - rel is a space separated list for HTML at least
* RelShort[er]
** Ambiguous as to whether it refers to the URL or the content itself (e.g. abstract).
* RelShorturl
** Too many possible permutations: short[_- ]?ur[il] -> shorturl, short_url, short-url, "short url", short_uri, short-uri, "short uri", etc. leads to implementations supporting multiple variations.
** Intellectual property issues:
*** Trademark status claimed by shorturl.com (shortlink infringes no known common law or registered trademarks)
*** Copyright protected specification (shortlink specification is public domain)
*** Patent status unknown (shortlink carries a patent pledge and has no known patents)
** No effort to standardise via the usual processes (shortlink was submitted to IETF/W3C for discussion)

rel-tag-spaces

2007-02-05T14:40:26Z

Yanivg:

This is a list of "name spaces" suitable for use in tagging, and by the [[rel-tag]] microformat. Please feel free to add to it, in alphabetical order

==A9==
*One word - http://a9.com/microformats
*Multi-word - http://a9.com/source+code (plus sign)

==del.icio.us==
*One word - http://del.icio.us/tag/dog
*Multi-word - http://del.icio.us/tag/german_shepherd (underscore)

==eBay==
*One word - http://search.ebay.com/door
*Multi-word - http://search.ebay.com/door-mat (hyphen)
*International - http://search.ebay.co.uk/door (etc.)

==Flickr==
*One word - http://www.flickr.com/photos/tags/key
*Multi-word - http://www.flickr.com/photos/tags/key_hole (underscore)

==Technorati==
*One word - http://technorati.com/tag/cheese
*Multi-word - http://technorati.com/tag/apple+pie (plus sign)

==Wikipedia==
*One word - http://en.wikipedia.org/wiki/sugar
*Multi-word - http://en.wikipedia.org/wiki/brown_sugar (underscore)

===Issues (Wikipedia)===
*Case sensitivity (http://en.wikipedia.org/wiki/Perry_Barr works; http://en.wikipedia.org/wiki/perry_barr does not)
*Caution should be exercised when using Wikipedia as a name-space. For example, an article about Birmingham, Alabama, tagged with a link to http://en.wikipedia.org/wiki/Birmingham would link to an article about Birmingham, England.

==Wikitravel==
For place names.
*One word - http://wikitravel.org/en/London
*Multi-word - http://wikitravel.org/en/East_Grinstead (underscore)

===Issues (Wikitravel)===
*A tag using, e.g. http://wikitravel.org/en/Newcastle will link to a disambiguation page.

==Yedda==
For Questions & Answers:
*One word - http://yedda.com/questions/tags/technology
*Multi-word - http://yedda.com/questions/tags/home+improvement (plus sign)

For people (by interest):
*One word - http://yedda.com/questions/tags/technology
*Multi-word - http://yedda.com/people/tags/web+2.0 (plus sign)

==Related pages==
{{rel-tag-related-pages}}

Microformats Wiki - User contributions [en]

rel-shortlink

rel-tag-spaces