Use Rel=Canonical Within HTTP Headers

Jun 20, 2011 - 8:32 am 8 by

Google now officially supports the use of the rel=canonical attribute within HTTP Headers.

In 2009, Google, Yahoo and Bing introduced the canonical tag as a way to allow webmasters to do 301 redirects without physically redirecting humans. A few months later, Ian Macfarlane tweeted asking for a method to do this over the X-robots protocol.

That is what this does - in a sense.

Since you cannot stick a rel=canonical attribute within a PDF, DOC or other file formats, outside of an HTML page - you can use the rel=canonical within the HTTP header to communicate the redirect.

Webmasters are cautiously concerned about the tag - but I honestly think it will be used well for the most part.

Forum discussion at WebmasterWorld & Sphinn.


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