kcsb28 safikhan commited on
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cfa4430
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Duplicate from ai4bharat/Pralekha

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Co-authored-by: Mohammed Safi Ur Rahman Khan <safikhan@users.noreply.huggingface.co>

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  1. .gitattributes +59 -0
  2. README.md +525 -0
  3. alignable/ben-00000-of-00002.parquet +3 -0
  4. alignable/ben-00001-of-00002.parquet +3 -0
  5. alignable/eng-00000-of-00003.parquet +3 -0
  6. alignable/eng-00001-of-00003.parquet +3 -0
  7. alignable/eng-00002-of-00003.parquet +3 -0
  8. alignable/guj-00000-of-00002.parquet +3 -0
  9. alignable/guj-00001-of-00002.parquet +3 -0
  10. alignable/hin-00000-of-00004.parquet +3 -0
  11. alignable/hin-00001-of-00004.parquet +3 -0
  12. alignable/hin-00002-of-00004.parquet +3 -0
  13. alignable/hin-00003-of-00004.parquet +3 -0
  14. alignable/kan-00000-of-00002.parquet +3 -0
  15. alignable/kan-00001-of-00002.parquet +3 -0
  16. alignable/mal-00000-of-00001.parquet +3 -0
  17. alignable/mar-00000-of-00002.parquet +3 -0
  18. alignable/mar-00001-of-00002.parquet +3 -0
  19. alignable/ori-00000-of-00001.parquet +3 -0
  20. alignable/pan-00000-of-00002.parquet +3 -0
  21. alignable/pan-00001-of-00002.parquet +3 -0
  22. alignable/tam-00000-of-00002.parquet +3 -0
  23. alignable/tam-00001-of-00002.parquet +3 -0
  24. alignable/tel-00000-of-00002.parquet +3 -0
  25. alignable/tel-00001-of-00002.parquet +3 -0
  26. alignable/urd-00000-of-00003.parquet +3 -0
  27. alignable/urd-00001-of-00003.parquet +3 -0
  28. alignable/urd-00002-of-00003.parquet +3 -0
  29. dev/eng_ben-00000-of-00001.parquet +3 -0
  30. dev/eng_guj-00000-of-00001.parquet +3 -0
  31. dev/eng_hin-00000-of-00001.parquet +3 -0
  32. dev/eng_kan-00000-of-00001.parquet +3 -0
  33. dev/eng_mal-00000-of-00001.parquet +3 -0
  34. dev/eng_mar-00000-of-00001.parquet +3 -0
  35. dev/eng_ori-00000-of-00001.parquet +3 -0
  36. dev/eng_pan-00000-of-00001.parquet +3 -0
  37. dev/eng_tam-00000-of-00001.parquet +3 -0
  38. dev/eng_tel-00000-of-00001.parquet +3 -0
  39. dev/eng_urd-00000-of-00001.parquet +3 -0
  40. test/eng_ben-00000-of-00001.parquet +3 -0
  41. test/eng_guj-00000-of-00001.parquet +3 -0
  42. test/eng_hin-00000-of-00001.parquet +3 -0
  43. test/eng_kan-00000-of-00001.parquet +3 -0
  44. test/eng_mal-00000-of-00001.parquet +3 -0
  45. test/eng_mar-00000-of-00001.parquet +3 -0
  46. test/eng_ori-00000-of-00001.parquet +3 -0
  47. test/eng_pan-00000-of-00001.parquet +3 -0
  48. test/eng_tam-00000-of-00001.parquet +3 -0
  49. test/eng_tel-00000-of-00001.parquet +3 -0
  50. test/eng_urd-00000-of-00001.parquet +3 -0
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README.md ADDED
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+ ---
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+ language:
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+ - bn
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+ - gu
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+ - hi
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+ - kn
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+ - ml
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+ - mr
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+ - split: ben
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+ path: alignable/ben-*
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+ path: train/eng_ben-*
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+ path: train/eng_hin-*
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+ - split: eng_kan
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+ path: train/eng_kan-*
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+ - split: eng_mal
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+ path: train/eng_mal-*
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+ - split: eng_mar
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+ path: train/eng_mar-*
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+ - split: eng_ori
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+ path: train/eng_ori-*
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+ - split: eng_pan
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+ path: train/eng_pan-*
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+ - split: eng_tam
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+ path: train/eng_tam-*
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+ - split: eng_tel
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+ path: train/eng_tel-*
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+ - split: eng_urd
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+ path: train/eng_urd-*
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+ - config_name: unalignable
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+ data_files:
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+ - split: ben
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+ path: unalignable/ben-*
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+ - split: eng
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+ path: unalignable/eng-*
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+ - split: guj
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+ path: unalignable/guj-*
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+ - split: hin
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+ path: unalignable/hin-*
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+ - split: kan
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+ path: unalignable/kan-*
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+ - split: mal
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+ path: unalignable/mal-*
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+ - split: mar
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+ path: unalignable/mar-*
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+ - split: ori
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+ path: unalignable/ori-*
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+ - split: pan
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+ path: unalignable/pan-*
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+ - split: tam
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+ path: unalignable/tam-*
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+ - split: tel
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+ path: unalignable/tel-*
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+ - split: urd
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+ path: unalignable/urd-*
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+ tags:
382
+ - parallel-corpus
383
+ - document-alignment
384
+ - machine-translation
385
+ task_categories:
386
+ - translation
387
+ ---
388
+
389
+ # Pralekha: Cross-Lingual Document Alignment for Indic Languages
390
+
391
+ <div style="display: flex; gap: 10px;">
392
+ <a href="https://arxiv.org/abs/2411.19096">
393
+ <img src="https://img.shields.io/badge/arXiv-2411.19096-B31B1B" alt="arXiv">
394
+ </a>
395
+ <a href="https://huggingface.co/datasets/ai4bharat/Pralekha">
396
+ <img src="https://img.shields.io/badge/huggingface-Pralekha-yellow" alt="HuggingFace">
397
+ </a>
398
+ <a href="https://github.com/AI4Bharat/Pralekha">
399
+ <img src="https://img.shields.io/badge/github-Pralekha-blue" alt="GitHub">
400
+ </a>
401
+ <a href="https://creativecommons.org/licenses/by/4.0/">
402
+ <img src="https://img.shields.io/badge/License-CC%20BY%204.0-lightgrey" alt="License: CC BY 4.0">
403
+ </a>
404
+ </div>
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+
406
+ **Pralekha** is a large-scale parallel document dataset spanning across **11 Indic languages** and **English**. It comprises over **3 million** document pairs, with **1.5 million** being English-Indic Pairs. This dataset serves both as a benchmark for evaluating **Cross-Lingual Document Alignment (CLDA)** techniques and as a domain-specific parallel corpus for training document-level **Machine Translation (MT)** models in Indic Languages.
407
+
408
+ ---
409
+
410
+ ## Dataset Description
411
+
412
+ **Pralekha** covers 12 languages—Bengali (`ben`), Gujarati (`guj`), Hindi (`hin`), Kannada (`kan`), Malayalam (`mal`), Marathi (`mar`), Odia (`ori`), Punjabi (`pan`), Tamil (`tam`), Telugu (`tel`), Urdu (`urd`), and English (`eng`). It includes a mixture of high- and medium-resource languages, covering 11 different scripts. The dataset spans two broad domains: **News Bulletins** ([Indian Press Information Bureau (PIB)](https://pib.gov.in)) and **Podcast Scripts** ([Mann Ki Baat (MKB)](https://www.pmindia.gov.in/en/mann-ki-baat)), offering both written and spoken forms of data. All the data is human-written or human-verified, ensuring high quality.
413
+
414
+ While this accounts for `alignable` (parallel) documents, In real-world scenarios, multilingual corpora often include `unalignable` documents. To simulate this for CLDA evaluation, we sample `unalignable` documents from [Sangraha Unverified](https://huggingface.co/datasets/ai4bharat/sangraha/viewer/unverified), selecting 50% of Pralekha’s size to maintain a 1:2 ratio of `unalignable` to `alignable` documents.
415
+
416
+ For Machine Translation (MT) tasks, we first randomly sample 1,000 documents from the `alignable` subset per English-Indic language pair for each development (dev) and test set, ensuring a good distribution of varying document lengths. After excluding these sampled documents, we use the remaining documents as the training set for training document-level machine translation models.
417
+
418
+ ---
419
+
420
+ ## Data Fields
421
+
422
+ ### Alignable & Unalignable Set:
423
+
424
+ - **`n_id`:** Unique identifier for `alignable` document pairs (Random `n_id`'s are assigned for the `unalignable` set.)
425
+ - **`doc_id`:** Unique identifier for individual documents.
426
+ - **`lang`:** Language of the document (ISO 639-3 code).
427
+ - **`text`:** The textual content of the document.
428
+
429
+ ### Train, Dev & Test Set:
430
+
431
+ - **`src_lang`:** Source Language (eng)
432
+ - **`src_text`:** Source Language Text
433
+ - **`tgt_lang`:** Target Language (ISO 639-3 code)
434
+ - **`tgt_text`:** Target Language Text
435
+
436
+ ---
437
+
438
+ ## Usage
439
+
440
+ You can load specific **subsets** and **splits** from this dataset using the `datasets` library.
441
+
442
+ ### Load an entire subset
443
+
444
+ ```python
445
+ from datasets import load_dataset
446
+
447
+ dataset = load_dataset("ai4bharat/Pralekha", data_dir="<subset>")
448
+ # <subset> = alignable, unalignable, train, dev & test.
449
+ ```
450
+
451
+ ### Load a specific split within a subset
452
+
453
+ ```python
454
+ from datasets import load_dataset
455
+
456
+ dataset = load_dataset("ai4bharat/Pralekha", data_dir="<subset>/<lang>")
457
+ # <subset> = alignable, unalignable ; <lang> = ben, eng, guj, hin, kan, mal, mar, ori, pan, tam, tel, urd.
458
+ ```
459
+ ```python
460
+ from datasets import load_dataset
461
+
462
+ dataset = load_dataset("ai4bharat/Pralekha", data_dir="<subset>/eng_<lang>")
463
+ # <subset> = train, dev & test ; <lang> = ben, guj, hin, kan, mal, mar, ori, pan, tam, tel, urd.
464
+ ```
465
+
466
+ ---
467
+
468
+ ## Data Size Statistics
469
+
470
+ | Split | Number of Documents | Size (bytes) |
471
+ |---------------|---------------------|--------------------|
472
+ | **Alignable** | 1,566,404 | 10,274,361,211 |
473
+ | **Unalignable** | 783,197 | 4,466,506,637 |
474
+ | **Total** | 2,349,601 | 14,740,867,848 |
475
+
476
+ ## Language-wise Statistics
477
+
478
+ | Language (`ISO-3`) | Alignable Documents | Unalignable Documents | Total Documents |
479
+ |---------------------|-------------------|---------------------|-----------------|
480
+ | Bengali (`ben`) | 95,813 | 47,906 | 143,719 |
481
+ | English (`eng`) | 298,111 | 149,055 | 447,166 |
482
+ | Gujarati (`guj`) | 67,847 | 33,923 | 101,770 |
483
+ | Hindi (`hin`) | 204,809 | 102,404 | 307,213 |
484
+ | Kannada (`kan`) | 61,998 | 30,999 | 92,997 |
485
+ | Malayalam (`mal`) | 67,760 | 33,880 | 101,640 |
486
+ | Marathi (`mar`) | 135,301 | 67,650 | 202,951 |
487
+ | Odia (`ori`) | 46,167 | 23,083 | 69,250 |
488
+ | Punjabi (`pan`) | 108,459 | 54,229 | 162,688 |
489
+ | Tamil (`tam`) | 149,637 | 74,818 | 224,455 |
490
+ | Telugu (`tel`) | 110,077 | 55,038 | 165,115 |
491
+ | Urdu (`urd`) | 220,425 | 110,212 | 330,637 |
492
+
493
+ ---
494
+
495
+ # Citation
496
+ If you use Pralekha in your work, please cite us:
497
+
498
+ ```
499
+ @inproceedings{suryanarayanan-etal-2025-pralekha,
500
+ title = "{PRALEKHA}: Cross-Lingual Document Alignment for {I}ndic Languages",
501
+ author = "Suryanarayanan, Sanjay and Song, Haiyue and Khan, Mohammed Safi Ur Rahman and Kunchukuttan, Anoop and Dabre, Raj",
502
+ booktitle = "Proceedings of the 14th International Joint Conference on Natural Language Processing and the 4th Conference of the Asia-Pacific Chapter of the Association for Computational Linguistics",
503
+ month = dec,
504
+ year = "2025",
505
+ address = "Mumbai, India",
506
+ publisher = "The Asian Federation of Natural Language Processing and The Association for Computational Linguistics",
507
+ url = "https://aclanthology.org/2025.ijcnlp-long.37/",
508
+ pages = "662--676"
509
+ }
510
+ ```
511
+
512
+ ## License
513
+
514
+ This dataset is released under the [**CC BY 4.0**](https://creativecommons.org/licenses/by/4.0/) license.
515
+
516
+
517
+ ## Contact
518
+
519
+ For any questions or feedback, please contact:
520
+
521
+ - Sanjay Suryanarayanan ([sanj.ai@outlook.com](mailto:sanj.ai@outlook.com))
522
+ - Haiyue Song ([haiyue.song@nict.go.jp](mailto:haiyue.song@nict.go.jp))
523
+ - Raj Dabre ([raj.dabre@cse.iitm.ac.in](mailto:raj.dabre@cse.iitm.ac.in))
524
+
525
+ Please get in touch with us for any copyright concerns.
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