... Methodological review Text classification Deep learning Viewpoint Critical reflection Round 1: first, a small number of comments are randomly selected to be annotated; the text is then annotated by relevant experts, a consensus is reached through discussion and a classification protocol is constructed...

... analysis Systematic review Methodological review Thematic review A total of 5 topics and 27 sub-topics were identified and the major theme is market intelligence. Sentiment variables were investigated not only as independent but also as dependent variables. The customer rating is the most...