Add dataset card: DiaLLM context, construction, columns, citation, fix license (#1)

- Add dataset card: DiaLLM context, construction, columns, citation, fix license (63c6b8db05d6d859ccbaab54250a2c190e077a17)

README.md

@@ -1,3 +1,64 @@
----
-license: apache-2.0
----
+---
+license: mit
+task_categories:
+- text-generation
+language:
+- en
+tags:
+- dialect
+- english-varieties
+- dpo
+- preference-dataset
+size_categories:
+- 10K<n<100K
+---
+
+# DiaLLM — Pooled Preference Dataset (Implicit Thread)
+
+Part of **DiaLLM: An Investigation into the Robustness-Generation Gap in
+English Dialect Adaptation** (EMNLP 2026 Main).
+
+![DiaLLM pipeline](https://raw.githubusercontent.com/surrey-nlp/diallm/main/assets/diallm_pipeline.png)
+
+45,690 preference pairs, pooling all three variety-specific sets
+([Australian](https://huggingface.co/datasets/surrey-nlp/alignment-australian-final),
+[Northern British](https://huggingface.co/datasets/surrey-nlp/alignment-british-final),
+[Indian](https://huggingface.co/datasets/surrey-nlp/alignment-indian-final)) without
+variety targeting. Used for **implicit-thread** DPO training, where the three
+varieties are pooled rather than targeted individually, preserving the
+variety-agnostic objective of that thread.
+
+## Construction
+
+Built from the UltraFeedback preference dataset ([Cui et al., 2023](https://arxiv.org/abs/2310.01377)),
+via Argilla's cleaned/binarized release ([`argilla/ultrafeedback-binarized-preferences-cleaned`](https://huggingface.co/datasets/argilla/ultrafeedback-binarized-preferences-cleaned), MIT licensed):
+the originally-preferred completion is transformed into a dialectal variant
+using [Multi-VALUE](https://github.com/SALT-NLP/multi-value) ([Ziems et al., 2023](https://arxiv.org/abs/2212.08011)),
+based on eWAVE morphosyntactic features. Code blocks are preserved verbatim
+during conversion.
+
+## Columns
+
+| Column | Description |
+|---|---|
+| `prompt` | Original UltraFeedback prompt (standard English, unmodified) |
+| `chosen` | Multi-VALUE dialectal variant of the preferred completion |
+| `rejected` | Original standard-English form of that completion |
+| `prompt_dialect_density` | eWAVE-based dialect feature density of the prompt |
+| `chosen_dialect_density` | eWAVE-based dialect feature density of the chosen completion |
+
+**Code, checkpoints, linguistic-analysis toolkit:** https://github.com/surrey-nlp/diallm
+
+**Paper:** https://arxiv.org/abs/2607.07669
+
+## Citation
+
+```bibtex
+@article{painter2026diallm,
+  title     = {DiaLLM: An Investigation into the Robustness-Generation Gap in English Dialect Adaptation},
+  author    = {Painter, Jordan and Srirag, Dipankar and Kappiyath, Adarsh and Kanojia, Diptesh and Joshi, Aditya and Yin, Lu},
+  year      = {2026},
+  eprint    = {2607.07669},
+  archivePrefix = {arXiv}
+}
+```