Evaluation Metrics in Ontology Modules

In recent years, there has been much advancement in the field of ontology modularity. However, work on evaluation metrics for modules is lacking. For the studies that do exist on evaluation metrics, they specialise on only a few metrics, and there is not always a quantitative approach to calculate them. Furthermore, the metrics are not comprehensive enough to apply to the different types of modules and it is unclear which metrics fare well with, say locality-based modules as opposed to those that fare well with partition modules. In this paper, we create a comprehensive list of both existing and new evaluation metrics for modules, together with equations to measure them. In order to test these metrics with existing modules, we create an ontology module metrics tool, Tool for Ontology Module Metrics (TOMM), to measure the metrics of an ontology module or a set of related ontology modules. This leads to uncovering metrics fare well with which module types.