[squid-users] ICAP and ISTag header

I am wondering how the ISTag header is used by the squid 3.

Will the change of the ISTag cause all cache to be invalid or just the
cache of the requested url become invalid?

In the code, it seems the IStag is only parsed on Options.

Thanks
Ming

-- 
Ming Fu | Senior Developer
WatchGuard Technologies, Inc. | www.watchguard.com
(905)-804-1855 ext 229
fming_at_watchguard.com
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