Add dataset card for ReSyn

README.md

@@ -1,4 +1,6 @@
 ---
+task_categories:
+- text-generation
 dataset_info:
   features:
   - name: regex
@@ -39,3 +41,38 @@ configs:
   - split: valid
     path: data/valid-*
 ---
+
+# ReSyn Dataset
+
+This repository contains the official datasets for the paper **[ReSyn: A Generalized Recursive Regular Expression Synthesis Framework](https://huggingface.co/papers/2603.24624)** (accepted at IJCAI 2026).
+
+- **Paper:** [ReSyn: A Generalized Recursive Regular Expression Synthesis Framework](https://huggingface.co/papers/2603.24624)
+- **GitHub:** [mrseongminkim/ReSyn](https://github.com/mrseongminkim/ReSyn)
+
+## Dataset Description
+
+ReSyn is a dataset designed for Programming-By-Example (PBE) systems focused on regular expression synthesis. It aims to capture the high structural complexity of real-world regexes, such as deep nesting and frequent use of union operations, which are often missing from simplified benchmarks. 
+
+The framework uses a divide-and-conquer approach to decompose complex synthesis problems into manageable sub-problems by adaptively predicting whether to split examples sequentially (Concatenation) or group them by structural similarity (Union).
+
+### Splits
+
+The dataset consists of the following splits:
+- **`train`**: 1,410,280 examples used for training the framework's core components.
+- **`valid`**: 32,236 examples for validation.
+- **`benchmark`**: 2,728 real-world regex synthesis problems for evaluating performance on structurally complex patterns.
+
+Each example includes a target `regex`, as well as sets of `positive_strings` and `negative_strings`.
+
+## Citation
+
+If you use this dataset in your research, please cite:
+
+```bibtex
+@inproceedings{kim2026resyn,
+  title={ReSyn: A Generalized Recursive Regular Expression Synthesis Framework},
+  author={Kim, Seongmin and Cheon, Hyunjoon and Kim, Su-Hyeon and Han, Yo-Sub and Ko, Sang-Ki},
+  booktitle={Proceedings of the Thirty-Fifth International Joint Conference on Artificial Intelligence (IJCAI-26)},
+  year={2026}
+}
+```