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How to Add canonical tags on .ASPX pages?
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What is the proper way (or is it possible) to add canonical tags on website pages that end in .aspx?
If you add a canonical tag to the Master Page it will put that exact canonical tag on every page, which is bad.
Is there a different version of the tag to put on individual pages?
And one to put on the home page without the Master Page error?
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Put a asp:placeholder or asp:literal in masterpage. When you want to have a canonical-tag from an inheriting page, just give placeholder / literal value.
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The Master Page is the main template page that all of the asp pages on the site are based on. If I put a standard canonical url tag in the Master Page, that canonical url will then be on all of the pages.
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Yes that is the correct code for apache sites, but asp sites don't have a section.
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The extensions of the pages won't matter, provided you're able to actually put the canonical tag itself within the of the page. If you put in the , it'll be ignored.
You only need to put the canonical tag on pages that are duplicates of other pages. You'll need to be able to specify the correct href for the canonical tag for each page, which is the full URL of the page it's a duplicate of. If you only have that level of control to place this only on the duplicate pages, you are still ok, as you can have a page rel=canonical to itself (according to Matt Cutts here). So if all the duplicate URLs and the original URL all rel=canonical to the original page, it should work. If you don't even have that level of control, you might not be able to use the canonical tag. I hope that's what you mean by "Master Page"... if you have each master page rel=canonical to itself, it sounds like it could solve this for you.
FYI, if you can 301 redirect these duplicate pages to the original page, that's the preferred method of resolving duplicate content issues.
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Correct me if I'm wrong but isn't it only to add:
rel="canonical" href="URL" />
in the header?
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