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I just received a memo (dated Feb 29) from our pals at Mountain View. Apparently they want us to start using another tag to specify canonical urls.
As someone who builds a fair amount of websites, this obviously intrigued me, but I was curious to know if anybody else had started using it? Is anybody planning to?
It’s interesting for Wikipedia which intends to have all alternative URLs indexed, e.g.
http://en.wikipedia.org/wiki/Python_languagehas canonical URL/wiki/Python_(programming_language).It might also be useful for paged or sorted content, e.g.
/foobar?sorby=datewith canonical/foobar.Personally I just prefer to exclude all non-preferred versions of pages from index by adding
robots.txtrules (in case of Google it’s simple, because it accepts regular expressions there) and<meta robots>. It saves me bandwidth, and the result is probably the same.