code: public void getCategories(){
  		// download SCOP if required and load into memory
  		ScopDatabase scop = ScopFactory.getSCOP();
  		List<ScopDescription> superfams = scop.getByCategory(ScopCategory.Superfamily);
  
  		System.out.println("Total nr. of superfamilies:" + superfams.size());
  
  		List<ScopDescription> folds = scop.getByCategory(ScopCategory.Fold);
  		System.out.println("Total nr. of folds:" + folds.size());
  
  	}
docs: Get various categories