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Supporting rel="canonical" HTTP Headers

Google Webmaster Central Blog  Jun 17 11

Webmaster level: Advanced

Based on your feedback, we’re happy to announce that Google web search now supports link rel="canonical" relationships specified in HTTP headers as per the syntax described in section 5 of IETF RFC 5988. Webmasters can use rel="canonical" HTTP headers to signal the canonical URL for both HTML documents and other types of content such as PDF files.

To see the rel="canonical" HTTP header in action, let’s look at the scenario of a website offering a white paper both as an HTML page and as a downloadable PDF alternative, under these two URLs:

http://www. Full story...



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