Automatic Text Categorization In Terms Of Genre And Author

The two main factors that characterize a text are its content and its style. Both of them can be used as categorization means. In this paper we present an approach to text categorization in terms of genre and author for Modern Greek. In contrast to hitherto stylometric approaches, we attempt to take full advantage of existing natural language processing (NLP) tools. To this end, we propose a set of style markers including analysislevel measures that represent the way in which the input text has been analyzed and capture useful stylistic information without additional cost. We present a set of smallscale but reasonable experiments in text genre detection, author identification as well as author verification tasks and show that the performance of the proposed method is better in comparison with the most popular distributional lexical measures, i.e., functions of vocabulary richness and frequencies of occurrence of the most frequent words. All the presented experiments are based on unrestricted text downloaded from the World Wide Web (WWW) without any manual text preprocessing or text sampling. Various performance issues regarding the training set size and the significance of the proposed Stamatatos et al. Text Categorization 2 style markers are discussed. Our system can be used in any application that requires fast and easily adaptable text categorization in terms of stylistically homogeneous categories. Moreover, the procedure of defining analysis-level markers can be followed in order to employ already existing text processing tools for the extraction of useful stylistic information.