. . . . "The queries shown in Listing 6 could be extended to obtain information that enables the reconfigure the SCN. The bi-directionality between the SCN and the central unit is a novelty in the semantic web domain. Specifically, the mechanism of using the ontology to interact with external devices. In general, the ontologies are not designed to be used in that way, therefore a central API is needed to be designed to perform two main tasks. Firstly, to receive all the messages from the SCN, synchronize them (by using timestamps) and then populate the ontology. Secondly, to check the ontology inferred knowledge and to use it for reconfigure the SCN by triggering a specific action (e.g., recording and triggering an alarm), changing the image pro- cessing algorithm or by saying to the smart camera to focus on a specific ROI. The dependency on the central API leaves an open question about the automatic externalization of the ontology knowledge, i.e., making the ontology to automatically output the inferred knowledge." . . . . "2019-11-12T12:34:11+01:00"^^ . .