A more detailed view of the class hierarchy with key relations between them is shown in Fig. 2. Having defined the modelled classes, the next OWL 2 syntax elements are the object class properties. Fig. 2. Representation of the ontology model Table 1. Object Properties Table 5. FMECA and ontology syntax Table 4. FMECA and ontology vocabulary mapping All relevant terms were checked to assess if they could be expressed through the model or initialised in it. Next, the
