Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 6/24/83; site deepthot.UUCP Path: utzoo!watmath!deepthot!julian From: julian@deepthot.UUCP (Julian Davies) Newsgroups: net.mail,net.wanted Subject: Re: Anyone know about X.400? Message-ID: <245@deepthot.UUCP> Date: Sat, 24-Mar-84 09:45:59 EST Article-I.D.: deepthot.245 Posted: Sat Mar 24 09:45:59 1984 Date-Received: Sun, 25-Mar-84 13:54:59 EST References: <1135@cbosgd.UUCP> Organization: UWO CS, London Canada Lines: 12 Directory services have not yet been specified. And yes, a 'user agent' program is supposed to provide the user interface. The X.4xx recommendations are only concerned with what happens on the network, not with what kind of user interface may be built. I agree with Mark, the definitions are fairly impenetrable. I wish there were more worked examples in the definitions. The protocols are quite different from anything now happening on Usenet (or ARPAnet), and require an 8-bit wide data path for session connections. Everything is encoded in a system of 'self-describing data structures' -- where anything starts with a length code and type code(s), which is where the 8-bit wide data path is needed even if the stuff being encoded is ultimately just ASCII text strings.