In each formal consultation, an introduction and background to the project were given with the aid of a slide presentation, then an early version of a public health classification, rendered through a Web browser, was demonstrated, concluding with 22 Noy & McGuinness 2001. 23 For more information see http://protege.stanford.edu. 24 Noy & McGuinness 2001: 5-8. the definition of public health. This was followed by a live collaborative session using the Protégé software, during which changes and additions to the class structure were made in real time. Lastly, participants were asked to identify further practical uses for a unified public health classification. An example of the agenda and other pre-consultation material that was sent to participants is in Appendix B.