In article <41d6f9eb-20a7-4547-859e-2eef5aedd3b2@xxxxxxxxxxxxxxxxxxxx> you write: >Last-Modified (at least) should be regarded as absolutely essential. >Again, these dates are sometimes important for patent litigation purposes. We have a process to respond to requests for document authentication and I can assure you it does not involve FTP at all, nor does it depend on any dates in HTTP headers. You can learn all about it here: https://ietf.org/about/administration/legal-request-procedures/ R's, John
