Constructors are usually only evaluated once, to set initial default values to some properties of the instances. At query execution time, the SPARQL variable ?this is bound to the current instance of the class. Self-sticking tags will print from the kiosk, along with your boarding pass. For government-funded course, a 20% of full course fee before funding will be charged. — Less than 1 week before commencement of the course, a 30% of the full course fee will be charged. The default value shall be used for an argument if no value has been specified explicitly in the template call. It is strongly recommended to define an rdfs:comment for each argument, to describe the role of the argument in the query.