Short Link

This plugin adds a rel=”shortlink” link to each page as well as the
corresponding HTTP header.

Author:Rob Allen, Sam Johnston (profile at wordpress.org)
WordPress version required:2.5
WordPress version tested:2.7.9
Plugin version:1.0
Added to WordPress repository:14-04-2009
Last updated:18-10-2014
Warning! This plugin has not been updated in over 2 years. It may no longer be maintained or supported and may have compatibility issues when used with more recent versions of WordPress.
Rating, %:0
Rated by:0
Plugin URI:http://code.google.com/p/shortlink/
Total downloads:2 459
Active installs:70+
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The Short Link WordPress plugin automatically creates a link element in the section of the post's page with rel="shortlink" attributes. The URL in the href attribute defaults to the id number of the post in question but can be overridden with a human-friendly slug after the post has been saved.

It also creates an HTTP Link header that conveys the same information as a performance optimisation (clients need only do a HTTP HEAD to resolve the URL)

The link element looks like this:

<link rel="shortlink" href="{url}" />

The HTTP header is:

Link: <{url}>; rel=shortlink

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