I think the issue between opaque validators vs. header-based validators is one of where you expect the additional implementation work to be if a different value is chosen as validator. IF: {eq {Content-MD5 "blah"}} or content-validator: md5:blah ==== IF: {eq {Last-Modified "Fri, 01 Dec 1995 14:13:06 gMT"}} or content-validator: lastmodified:19951201141306 These are logically equivalent in terms of protocol, but using IF the cache has to decide which field is relevant for determining cache validity, while in the latter case, the server decides which field is valid.Received on Sunday, 10 December 1995 13:35:56 UTC
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