Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!watmath!clyde!akgua!mcnc!decvax!decwrl!amd!fortune!wdl1!jbn From: jbn@wdl1.UUCP (jbn ) Newsgroups: net.unix-wizards Subject: Re: Re: Multiple file versions - more li Message-ID: <445@wdl1.UUCP> Date: Wed, 26-Sep-84 21:25:57 EDT Article-I.D.: wdl1.445 Posted: Wed Sep 26 21:25:57 1984 Date-Received: Sun, 30-Sep-84 00:50:57 EDT Lines: 8 Nf-ID: #R:opus:-83800:wdl1:17100009:000:510 Nf-From: wdl1!jbn Sep 26 17:33:00 1984 Apollo has a nice approach in their Domain Software Enginering Environment. It is possible to have files with multiple versions; there are SCCS-like utilities for maintaining them, the versions are maintained with backward differences (the latest version is present in its entirity and old versions exist as differences from the latest one) and the operating system has mechanisms for reading the latest version of such files and preventing programs that don't know how to update them from changing them.