@article{zeldes-etal-2025-erst,
    title = "e{RST}: A Signaled Graph Theory of Discourse Relations and Organization",
    author = "Zeldes, Amir  and
      Aoyama, Tatsuya  and
      Liu, Yang Janet  and
      Peng, Siyao  and
      Das, Debopam  and
      Gessler, Luke",
    journal = "Computational Linguistics",
    volume = "51",
    number = "1",
    month = mar,
    year = "2025",
    address = "Cambridge, MA",
    publisher = "MIT Press",
    url = "https://preview.aclanthology.org/fix-sig-urls/2025.cl-1.3/",
    doi = "10.1162/coli_a_00538",
    pages = "23--72",
    abstract = "In this article we present Enhanced Rhetorical Structure Theory (eRST), a new theoretical framework for computational discourse analysis, based on an expansion of Rhetorical Structure Theory (RST). The framework encompasses discourse relation graphs with tree-breaking, non-projective and concurrent relations, as well as implicit and explicit signals which give explainable rationales to our analyses. We survey shortcomings of RST and other existing frameworks, such as Segmented Discourse Representation Theory, the Penn Discourse Treebank, and Discourse Dependencies, and address these using constructs in the proposed theory. We provide annotation, search, and visualization tools for data, and present and evaluate a freely available corpus of English annotated according to our framework, encompassing 12 spoken and written genres with over 200K tokens. Finally, we discuss automatic parsing, evaluation metrics, and applications for data in our framework."
}