Text similarity has also been used for relevance feedback and text classification (Rocchio, 1971), word sense disambiguation (Lesk, 1986;Schutze, 1998), and extractive summarization , in the automatic evaluation of machine translation (Papineni et al., 2002), text summarization (Lin and Hovy, 2003), text coherence (Lapata and Barzilay, 2005) and in plagiarism detection (Nawab et al., 2011).
briefly, for each open-class word in one of the input texts, we compute the maximum semantic similarity 4 that can be obtained by pairing it with any open-class word in the other input text.