This document specifies Object-Process Methodology (OPM) with detail sufficient for enabling practitioners to utilise the concepts, semantics, and syntax of OPM as a modelling paradigm and language for producing conceptual models at various extents of detail, and for enabling tool vendors to provide application modelling products to aid those practitioners.

While this document presents some examples for the use of OPM to improve clarity, it does not attempt to provide a complete reference for all the possible applications of OPM.