Canonical URL’s
Ein eines neues HTML Tag soll Duplicate-Content vermeiden helfen:
Last week Google, Yahoo, and Microsoft announced support for a new link element to clean up duplicate urls on sites. The syntax is pretty simple: An ugly url such as http://www.example.com/page.html?sid=asdf314159265 can specify in the HEAD part of the document the following:
<link rel=”canonical” value=”http://example.com/page.html”/>
Von Joost de Valk gibt es bereits Plugins für WordPress und Drupal.