def __init__(self,
              collection,
              dataset,
              tagrelMethod,
              tpp='lemm',
              rootpath=ROOT_PATH):
     TagBasedSearchEngine.__init__(self, collection, dataset, tpp, rootpath)
     self.reader = TagrelReader(collection,
                                dataset,
                                tagrelMethod,
                                nonnegative=0,
                                rootpath=rootpath)
     self.name = "%s(%s)" % (self.__class__.__name__, self.reader.name)
     self.outputdir = os.path.join(self.outputdir, tagrelMethod)