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From: jon@CS.UCL.AC.UK.UUCP
Newsgroups: mod.protocols.tcp-ip
Subject: Re: talking of and to gateways and bridges
Message-ID: <8704010943.AA08745@ucbvax.Berkeley.EDU>
Date: Wed, 1-Apr-87 04:44:59 EST
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Posted: Wed Apr  1 04:44:59 1987
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Chris,

ROS stands for Remote OperationS, and REX stands for Remote
EXexcution. They are part of the ECMA (European Computer
Manufacturers Association) input to draft standards work on
distributed computing. REX is a Birrel & Nelson type
'minimum packet' transaction transport protocol, whilst ROS uses
ASN (Abstract Sysntax Notation) as a presentation layer to
to define call/reply/error messages and parameters and
to provide machine independance of call and reply parameter
representation. The ANSA (Advanced Network Systems
Architecture) research group have put a lot of work into their
design. The goal is to provide a system where code for client/server
model interactions may be generated automatically (RPC type
work), but to allow for other types of interaction too.

jon