Because it attempts to capture the breadth of public health activity, and to serve multiple uses, the public health classification has a necessarily complex, multidimensional structure that is difficult to present adequately in paper-based forms. A web-based version, rendered in HTML, will allow interactive engagement and easier access to the structure, coverage and documentation (e.g. definitions). An early version of the classification was mounted on a test website and demonstrated in consultations with reasonable acceptance and understanding of its use as a navigation tool. A facility to collect structured feedback-rather than just adding large numbers of new classes and subclasses-and processes to compile and review this information will be needed to improve the utility of the classification for practical applications.