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Link rel = "canonical": If different versions of the user manual use the same canonical url?

Should two different versions of the user guide use a different canonical URL ?

Documentation version 1.1.0.Final :

 <link rel="canonical" href="http://docs.foo.org/1.1.0.Final/index.html">

Documentation version 1.2.0.Final :

 <link rel="canonical" href="http://docs.foo.org/1.2.0.Final/index.html">

Or use the same canonical URL in two different versions of the user guide?

Documentation version 1.1.0.Final :

 <link rel="canonical" href="http://docs.foo.org/latestFinal/index.html">

Documentation version 1.2.0.Final :

 <link rel="canonical" href="http://docs.foo.org/latestFinal/index.html">
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Per Canonical linking of links from RFC 6596 , canonical link type can only be used for URIs that identify content

  • duplicate , or
  • a superset .

Since this is not necessary for different versions of the user manual (since functions can be added / removed / changed), the canonical link type should not be used to always indicate the latest version. If you want to use canonical , this should be self-referential.

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Source: https://habr.com/ru/post/1257841/

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