“…As a result, an ontology-based semantic model has become prevalent in the area of context aware and Smart City technologies [1,12,14]. Nonetheless, semantic processing is not capable of managing such vast amounts of data, as are expected in the Smart City scenario, in realtime [1,2,3,8]. Furthermore, in [10], the call for application of Big Data technology in Smart Grid analytics is emphasized and, as suggested in [11], cloud delivery of energy management solutions is largely becoming an accepted approach.…”