Presentation made by Celeste COLANTONIO (Shell) at the 1st CAPE-OPEN European Meeting held on February 13, 2004 in Skopau, Germany.

It describes the work done by the Special Interest Group of CO-LaN (made of CO-LaN members) dedicated to Unit Operations. The design of the CAPE-OPEN interfaces for dynamic Unit Operations was revised, improved and prototyped. Also feedback was collected on interoperability expériences with CAPE-OPEN Unit Operations leading to a set of recommendations / clarifications not yet formalized in a document.