The class resolving topic 3 of INEX 2009 using the DDS
//(classical_music|opera|orchestra|performer|singer)[about(.,italian spanish
opera singer -soprano)] //classical_music OR //opera OR //orchestra OR
//performer.
XalanTopic3() -
Constructor for class it.unipd.dei.ims.nestor.experiment.test.tois2014.inex.old.XalanTopic3