High Quality Content by WIKIPEDIA articles! Open System Environment (OSE) Reference Model (RM) or OSE Reference Model (OSE/RM) is one of the first reference models for Enterprise Architecture. It provides a framework for describing open system concepts and defining a lexicon of terms, that can be agreed upon generally by all interested parties. The Open System Environment (OSE) forms an extensible framework that allows services, interfaces, protocols, and supporting data formats to be defined in terms of nonproprietary specifications that evolve through open (public), consensus-based forums. A selected suite of specifications that defines these interfaces, services, protocols, and data formats for a particular class or domain of applications is called a profile.