Xtreams is the Squeak port of VW Xtreams. It provides flexible and scalable streaming for Smalltalk.
Xtreams is a generalized stream/iterator framework providing simple, unified API for reading from different kinds of sources and writing into different kinds of destinations (Collections, Sockets, Files, Pipes, etc). Streams themselves can be sources or destinations as well. This allows to stack streams on top of each other. At the bottom of such stack is some kind of non-stream (e.g. a collection), we will call it a terminal.