Les moteurs s'associent contre le duplicate content

Une nouvelle fois la réponse à l'un des principaux problèmes rencontrés par les grands moteurs de recherche pour garantir l'intégrité de leur index, après le spam et les tentatives pour déjouer les algorithmes anti-triche, passe par une solution commune.

Les trois moteurs internationaux principaux que sont Google, Live Search et Yahoo viennent ainsi de s'entendre sur la création d'une indication que les webmasters sont invités à placer dans le header html des pages qui feraient doublon avec d'autres.

Pour simplifier il vous conseille de leur indiquer quelle est la version de page qui doit être indiquée dans l'éventualité où la profusion de variables dans vos scripts rendrait le même contenu accessible sous plusieurs adresses http://

Par exemple si la page a indexer est http://www.example.com/products vous indiquerez dans la portion HEAD des pages
http://www.example.com/products?trackingid=feed
http://www.example.com/products?sessionid=hgjkeor2
http://www.example.com/products?printable=yes&trackingid=footer
la mention :
<link rel=”canonical” href=”http://www.example.com/products” />

De sorte que chacun des trois moteurs comprendra que c'est bien cette adresse indiquée qu'il faudra conserver.

A noter que même si c'est à vous de bosser et que au final c'est pas de la tarte à implémenter dans les scripts celà peut être une solution pertinente aux problème d'indexation et à la disparition des "pages en double" que comporterait votre site.

Sources : le blog de Google, le blog de Live Search et le blog de Yahoo

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