Fig. 1

Overview of annotation tools and their functionalities. The annotation tools considered come from a recent extensive review of tools for manual annotation of documents [34]. In addition, we consider also TeamTat [35] and INCEpTION [36] and report our judgements. The annotation tools are assessed with 22 criteria, defined in the latter review study, among three categories: Data (D), Functional (F) and Technical (T). The fulfillment of each criterion is indicated with a color in a three levels scale: white (feature absent or not met), light blue (feature partially satisfied), blue (feature satisfied)