Control apparatus of an automation system

Control apparatus of an automation system A control apparatus of an automation system (AS), said control apparatus (1) comprising a database (3) adapted to store time series data in a historian data source (HDS) and adapted to store events (E) derived from said time series data based on event detection rules in an event data source (EDS), wherein a semantic data or event query (SQ) received by said control apparatus (1) is mapped to a corresponding data source of said database (3) to retrieve the queried data or event which are contextualized using an ontological context model (CM) of said automation system (AS) stored in said database (3) and output by said control apparatus (1) in a semantic format.