This paper is a case study that describes how the Business Object Reference Ontology (BORO) approach works in practice. It describes in detail a selected part of the work using the approach that has been going on in the EPISTLE community for several years. This will help people better understand not just the benefits of using the approach, but also what it is and how it is applied. It will also illustrate the kinds of results it gives - by providing specific examples of the kind of very general patterns this type of analysis typically produces.

This paper examines the development of a conceptual model that defines Shell’s information requirements - the Downstream Data Model (DDM). The model has its roots in a framework based on the notion of ontological commitment and the focus of the analysis seeks to provide useful insights into the metaphysical aspects relevant to the creation and deployment of the DDM – primarily that related to the extensional nature of the model. The impact of this choice and the methodology employed in the production of the model is examined through example patterns covering spatial and temporal dissectiveness and the use of powerclasses. Having been through the experience of conceptual model development, the work concludes that the separation of the implementational and epistemological ‘gloss’ from a studied understanding of ontological commitment is a necessary evolution of practice in conceptual modelling.