This paper addresses the need for text visualization systems that can support discourse analysis. While fruitful work has been undertaken exploring the paradigmatic axis in systemic functional linguistics, there is much scope for complementary modeling along the syntagmatic axis. However, in exploring long-range text patterns we face the problem that it is difficult for a human analyst to track complex and unfolding relationships in what is high-dimensional data. I introduce AppAnn, a system designed to support linguists in undertaking such long-range analysis and demonstrate how it can be used to visualize patterns of appraisal in texts.
© by Walter de Gruyter Berlin Boston