"Can We Get By Using Just Files and Directories (Composing Streams And Attributes From Files And Directories)?" http://www.namesys.com/v4/v4.html#compose_streams Couldn't we use ReiserFS in place of BFS ? Doesn't it provide all the functionality needed? I also recommend reading this to the OBOS developers: Future Vision by Hans Reiser http://www.namesys.com/whitepaper.html quote : "Utility of an operating system is more proportional to the number of connections possible between its components than it is to the number of those components." alex. PS: i'm not promoting reiserFS, i just found interesting ideas in it :)