10.4.11 410 Gone
The requested resource is no longer available at the server and no
forwarding address is known. This condition is expected to be
considered permanent. Clients with link editing capabilities SHOULD
delete references to the Request-URI after user approval. If the
server does not know, or has no facility to determine, whether or not
the condition is permanent, the status code 404 (Not Found) SHOULD be
used instead. This response is cacheable unless indicated otherwise.
The 410 response is primarily intended to assist the task of web
maintenance by notifying the recipient that the resource is
intentionally unavailable and that the server owners desire that
remote links to that resource be removed. Such an event is common for
limited-time, promotional services and for resources belonging to
individuals no longer working at the server's site. It is not
necessary to mark all permanently unavailable resources as "gone" or
to keep the mark for any length of time -- that is left to the
discretion of the server owner.
Tout à fait d'accord pour le rattrapage raisonnable... toujours le bon sens ;o)WebRankInfo a dit:le bon sens... OK mais il est normal je trouve que le robot laisse au moins une chance au webmaster qui a une 404. En clair, si le serveur était en rade, il a droit à l'oral de rattrapage.
:?Google met à jour son index automatiquement, intégralement et à intervalles réguliers. Lorsque nous explorons le Web, nous trouvons les nouvelles pages, nous éliminons les liens périmés ou sans cible et nous mettons à jour les liens selon besoin. Les liens périmés ou sans cible disparaissent automatiquement de notre index lors de la prochaine exploration du Web.