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EXT: Canonical tag for duplicate content¶

Author:	Kasper Skårhøj
Created:	2002-11-01T00:32:00
Changed by:	Georg Ringer
Changed:	2009-04-21T12:13:49.570000000
Classification:	canonical
Keywords:	canonical, seo, duplicate content
Author:	Georg Ringer
Email:	http://www.cyberhouse.at
Info 4:
Language:	en

EXT: Canonical tag for duplicate content - canonical

EXT: Canonical tag for duplicate content¶

Extension Key: canonical

Language: en

Keywords: canonical, seo, duplicate content

This document is published under the Open Content License

available from http://www.opencontent.org/opl.shtml

The content of this document is related to TYPO3

- a GNU/GPL CMS/Framework available from www.typo3.org

Table of Contents¶

EXT: Canonical tag for duplicate content 1

`Introduction 3 <#1.1.Introduction|outline>`_

What does it do? 3

Screenshots 3

`Users manual 4 <#1.2.Users%20manual|outline>`_

TT_news and the backPid 4

MountPoints 4

Show content from this page instead 4

`Configuration 5 <#1.3.Configuration|outline>`_

FAQ 5

Reference 5

`Known problems 6 <#1.4.Known%20problems|outline>`_

`To-Do list 7 <#1.5.To-Do%20list|outline>`_

`ChangeLog 8 <#1.6.ChangeLog|outline>`_

Introduction¶

What does it do?¶

This extension introduces the canonical tag which avoids bad ranking of your website if you are using duplicate content. The tag is used in the following use cases:

tt_news and the backPid
MountPoints
Option “Show content from this page instead”

The canonical tag is supported by the companies Google, Microsoft and Yahoo.

This extension is no magical machine and doesn't care about duplicate content which is created by an editor himself or by using the cObj RECORDS or CONTENT!

|img-3| This extension has been created by CYBERhouse

Screenshots¶

Sorry, there are no screenshots because this extension just creates one line in the source code.

Users manual¶

To use this extension you just need to follow this steps:

Install the extension

If your PAGE object is named “page”, you are done. If not, check out the next chapter in this manual.

TT_news and the backPid¶

The backPid is used inside tt_news if you use more than one LIST view and one SINGLE view to get from the backPid back to the correct list page. Because of different parameters in the url, search bots will recognize the SINGLE page as duplicate content.

The extension canonical creates the tag with a link to the SINGLE page without the backPid.

Important: This extension will not resolve the troubles you still have with indexed_search and duplicate content or bigger cache tables!

MountPoints¶

MountPoints are used to show one page or a page tree on a different place again. This is the best example for duplicate content because the page (or a part of the tree) is identical with other pages of your website

The extension canonical creates the tag with a link to the original page.

Show content from this page instead¶

The option “Show content from this page instead” inside the page properties allows an editor to display on one page the content of another one.

The extension canonical creates the tag with a link to the original page.

Configuration¶

This extension is automatically loaded by using the code you can find in the file ext_typoscript_setup.txt

includeLibs.tx_canon = EXT:canonical/class.user_canonical_check.php
page.headerData.3275 = USER
page.headerData.3275 {
        …
        …
}

FAQ¶

If your PAGE object isn't called “page”, you need to copy the content of that file and rename “page” to the name you are using.
If you are using “page.headerData.3275” already, copy everything to your TS and rename the number to something else.

Default

1

[tsref:page.headerData.3275. ]

((generated))¶

Example¶

Here you would show an example of the stuff from the reference or so:

page.headerData.3275 {
    debug = 1
}

Known problems¶

It isn't a real problem but this extension won't do anything in all other cases of duplicate content.

To-Do list¶

Create a general approach for other extensions and it's backPids

ChangeLog¶

Take a look at the changelog file

8