Chemnitz at CLEF IP 2012: Advancing Xtrieval or a baseline hard to crack

Abstract. For the 2012 CLEF-IP Claims to passage task we reused and improved our Xtrieval framework. Our two-step approach comprises creating two Lucene indexes: one containing the whole patent application documents and one containing the same documents split into passages. We prepared three setups and conducted each with a translated and an untranslated topic set, which was just applied to the claims. The submitted setups differ in the way of retrieving the results and merging them. No further techniques were used. Therefore our experiments had very simple setups, which nevertheless achieved good results. There are still plenty of possible improvements, which can easily be tested with our framework, because it offers a comprehensive set of methods for conducting and evaluating retrieval experiments.