Development of linguistic corpus methods for the study of dialectal varieties of written modern Arabic. Development of a collaborative platform for the annotation and linguistic analysis of Arabic texts. Extraction of texts from heterogeneous sources available online for the creation of a balanced corpus consisting of the dialectal varieties of Mashreq and Maghreb. Semi-automatic annotation of a significant subcorpus according to the Universal Dependencies standard. Construction of an accurate lexical-semantic resource queryable via Web starting from the subcorpus.