Multi-Word Expressions Annotations Effect in Document Classification Task

Document classification is a necessary task for most Natural Language Processing tools since it classifies documents content in a helpful and meaningful way. The main concern in this paper is to investigate the impact of using multi-words for text representation on the performances of text classification task. Two text classification strategies are proposed to observe the robustness of each of them. First, we will deal with the literature review of existing linguistic resources in Arabic language. Secondly, we will present a classification method that is based on domain candidate simple terms. These terms are automatically extracted from multiple specialized corpora depending on their appearance frequency. Then, we will present a detailed description of a classification method based on multi-word expressions dictionary. CompounDic, an Arabic multi-word expressions dictionary, will be used to automatically annotate multi-word expressions and variations in text. Finally, we carried out a series of experiments on classifying specialized text based on simple words and multi-word expressions for comparison purposes. Our experiments show that the use of multi-word expressions annotations enhances the text classification results.