TYPO3: Cannonical URL voor SEO multiple domains

#If there is duplicate content on another domain, you can easily add an cononical link to the head of the page.

# canonical link
page.headerData.393 = COA
page.headerData.393 {
    wrap = <link rel="canonical" href="|" />

    # baseurl
    10 = TEXT
    10.value = http://www.domain.com

    # current url
    20 = TEXT
    20.data = getIndpEnv:REQUEST_URI
}