Challenge: a discourse parsing model for conversation trained on the STAC is hard due to the complexity of discourse graphs and the frequent lack of surface cues provided by EDUs.
Approach: They propose a discourse parsing model for conversation trained on the STAC that encodes discourse units and uses a multitask setting to predict relation labels.
Outcome: The proposed model outperforms state-of-the-art models for discourse attachment prediction with no loss in performance for attachment.

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Challenge: Discourse learning is a complex task, and schemas evolve across annotation efforts preventing compilation of smaller datasets into larger ones.
Approach: They propose a multitask learning approach that can combine discourse datasets from similar and diverse domains to improve discourse classification.
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Discourse Representation Parsing for Sentences and Documents (P19-1)

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Challenge: Experimental results show that our model outperforms competitive baselines by a wide margin.
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Challenge: Prior research in discourse relation recognition has treated these instances as separate examples during training, with a gold-standard prediction matching one of the labels considered correct at test time.
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Improving Dialogue Discourse Parsing via Reply-to Structures of Addressee Recognition (2023.emnlp-main)

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Challenge: Existing approaches to learn dialogue discourse parsing with related tasks require additional annotation, thus limiting their generality.
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A Regularization Approach for Incorporating Event Knowledge and Coreference Relations into Neural Discourse Parsing (D19-1)

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Challenge: Existing approaches to discourse parsing use commonsense knowledge and linguistic constraints to integrate them into neural network models.
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Next Sentence Prediction helps Implicit Discourse Relation Classification within and across Domains (D19-1)

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Challenge: Discourse relation classification is one of the most difficult tasks in discourse parsing.
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Enhancing Discourse Dependency Parsing with Sentence Dependency Parsing: A Unified Generative Method Based on Code Representation (2024.findings-emnlp)

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Challenge: Existing annotation resources for Discourse Dependency Parsing tasks are limited due to their complexity and annotation schema differences.
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Augmenting BERT-style Models with Predictive Coding to Improve Discourse-level Representations (2021.emnlp-main)

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Challenge: Existing language models do not produce suitable representations at the discourse level.
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Sequence Labeling Parsing by Learning across Representations (P19-1)

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Challenge: Constituency and dependency parsing are the main abstractions for representing syntactic structure of sentences . constituency parsers are considered disjointed tasks, and their improvements have been obtained separately.
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Top-down Discourse Parsing via Sequence Labelling (2021.eacl-main)

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Challenge: Discourse analysis is a systematic way to understand how texts are segmented hierarchically into discourse units.
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