15th October 2001
In the light of the level of interest in ZOOM at the Boston Spa ZIG, the ZOOM initiative now has its own web-site at zoom.z3950.org
Version 1.0 of the specification, which used to be at the address of the page you're reading, can now be found at zoom.z3950.org/api/zoom-1.0.html But you probably want the current version.