Ontology-Based Model of User Activity Data for Cyber-Physical Systems

The chapter focuses on the issue of modeling of user interaction with the graphical interface of cyber-physical systems. The primary subject of the presented study is users activity data, that is the user’s actions with system graphical interface and their characteristics. This data is collected during the process of software testing or experimental operation. An overview of existing ontologies of domain «Information Systems Graphic Interface» is given. We propose an open model of user activity data in the form of ontology based on the OWL 2 DL language. The main classes, properties, and axioms of this model are covered in the report. This model differs from the other existing ontologies in that it is focused on user activity data rather than the interface and its elements. In addition, it is based on description logic SHOIQ (D), which makes it possible to draw logical conclusions in the process of analysis by experts of the system usability. We also present the structure of software developed for user activity data collection which allows filling the ontology with specific data on the user experience with the interface. As an example, we describe possible tasks where the model and collected data can be used.