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/webmasters/community?hl=en
6/3/09
Original Poster
philsturgeon

Canonical conflicts with NOINDEX?

Our CMS is set up in a way to automatically add certain metadata such as canonical and robots="NOINDEX" based on certain criteria. In a few circumstances we have both appearing on the same page.
 
Will a NOINDEX rule stop a canonical tag from being read?
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Google user
6/3/09
Google user
No idea - good question.

Technically, the bot has to crawl the page to see the NoIndex....
so it may see the canonical link.
Whether it wopuld take the hint from a page being noindexed or not..... hmmmm
luzie
6/3/09
luzie
Hi philsturgeon,

>>> Will a NOINDEX rule stop a canonical tag from being read?

I'd say of course not. 'Noindex' doesn't mean the site is not being read by the bot (could have a 'noindex,follow' there for instance), it just won't show in the index later.

-luzie-
cristina
6/3/09
cristina
In principle, if you have a correct link rel="canonical" tag,
you do not need a meta noindex tag,
because the link rel="canonical" points search engines to the URL you want indexed in search results,
with a content similar to the URL that contains the link rel="canonical" tag.
.........
I think if possible you should have one or the other, not both.
..........
If the canonical URL appears only in link rel="canonical" tags, you will need anyway
other ways for search engines to find the canonical URL,
like proper <a> links to the canonical URLs, and the sitemap.
.....
Another thing is that link rel="canonical" is relatively new,
and it seems sometimes to be considered a 'hint', more than a directive,
so the answer to your question can only be
'try and see what happens'.

1918 (deprecated)
6/3/09
1918 (deprecated)
philsturgeon - do you mean that the canonicalized page is noinded'd or some other page has a canonical and a noindex?

Matt Cutts speaking as an official Google employee has said that canonical is not fail safe, only a "suggestion" - so I would say luzie is right.
cristina
6/3/09
cristina
@1918, what exactly do you mean?

18 MORE
Google user
6/11/09
Google user
::: EXAMPLE :::

1) http: // mysite.com / cars / big / redones.php
2) http: // www.mysite.com / cars / big / redones.php
3) https: // www.mysite.com / cars / big / redones.php
4) http: // www.mysite.com / cars / big / redones.php ? startnumber=1 & numitems=10
5) http: // www.mysite.com / cars / big / redones.php ? startnumber=1 & numitems=25
6) http: // www.mysite.com / cars / big / redones.php ? startnumber=21 & numitems=10
7) http: // www.mysite.com / cars / big / redones.php ? startnumber=1 & numitems=10
8) https: // www.mysite.com / cars / big / redones.php ? sort=price_asc
9) https: // www.mysite.com / cars / big / redones.php ? sort=price_desc
10) http: // www.mysite.com / cars / big / redones.php ? startnumber=1 & numitems=10 & sort=price_asc
1) http: // www.mysite.com / cars / big / redones.php ? startnumber=5 & numitems=10

1, 2 and 3 should be handled via Server based directives - 301 permanent Redirects.
1, 2 and 3 should be handled with Correct FUll/Absolute URLs in Links
1, 2 and 3 should be handled by using hte preferred one Only in any SE Sitemap(s) (if used)

4 - 10 are repeats/variants/partial duplications.
(NOTE: 11 is Not a duplciate/variant - it is likely to be showing content not found on the other URLs as it is Not use variant parameters!)
Such URLs should havea NoFollow applied to the Links.
Such URLs should/Could have NoIndex applied.
Such URLs should/Could have canonical applied.


Does that make sense?
 
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