Visualising Paths for Exploratory Search in the Health IT Ontology

Due to a lack of systematisation and unbiased information, finding the optimal combination of software products for health information systems is a challenging endeavour. We present a novel approach to visually explore the domain of application systems and software products for health care along the paths of the Health IT ontology (HITO). We present an algorithm and implementation in a web application that is freely available at the HITO website and licensed under the open source MIT licence. In comparison to other approaches of path-based exploration of knowledge graphs, the novelty of our approach is the use of path finding on the ontology level and combining this both with the instances of the classes along the chosen path as well as search filters to limit the search space. Our approach can be adapted to other domains where users with complex information needs interact with ontologies and knowledge graphs and can be supported by generative artificial intelligence in the future.