question: public TAC2008TopicFileSet ( String sTopicXMLFile , String sCorpusRootDir ) throws ParserConfigurationException , SAXException , IOException { TopicFile = sTopicXMLFile ; CorpusDir = sCorpusRootDir ; DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory . newInstance ( ) ; DocumentBuilder docBuilder = docBuilderFactory . newDocumentBuilder ( ) ; TopicXMLDoc = docBuilder . parse ( new File ( sTopicXMLFile ) ) ; Categories = null ; TrainingFiles = null ; TestFiles = null ; }
target:  Initializes the document set, given a TAC2008 topic XML file.