Under the present invention, when a request for a web page is received from a client on a server, the web page is built and analyzed for cacheability. If the web page is cacheable, an entity tag is generated. The entity tag generally identifies the various sources of dynamic content in the web page,...http://www.google.fr/patents/US7904662?utm_source=gb-gplus-shareBrevet US7904662 - System and program product for validating remotely cached dynamic content web pages
System and program product for validating remotely cached dynamic content ...