| --- |
| license: mit |
| task_categories: |
| - text-generation |
| language: |
| - ne |
| tags: |
| - nepali |
| - morphology |
| - root-affix |
| - devanagari |
| - low-resource |
| pretty_name: 'Nepali Root-Affix Dictionary ' |
| size_categories: |
| - 10K<n<100K |
| --- |
| # Nepali Root-Affix Dictionary |
|
|
| A word-level morphological segmentation dataset for Nepali, mapping surface |
| words to their root and affix components (e.g. `अँकाइनु` → `अँका` + `इनु`). |
|
|
| ## Dataset Details |
|
|
| ### Dataset Description |
|
|
| This dataset was built by scraping the **10th edition of the Nepali |
| dictionary**, parsing the scraped entries into structured word/root pairs, |
| and then applying a **heuristic rule engine** to extend root-affix coverage |
| to surface forms not explicitly listed as dictionary headwords (e.g. |
| inflected or derived forms of a root that *is* in the dictionary). Each row |
| records the raw surface word, its root, the affix (if any), the |
| `+`-delimited segmented string, and which process produced that row. |
|
|
| - **Language:** Nepali (ne) |
| - **Curated by:** [w4ashabii](https://huggingface.co/w4ashabii) |
| - **License:** MIT |
|
|
| ### Dataset Sources |
|
|
| - **Source text:** Nepali dictionary, 10th edition (https://archive.org/details/nepali-brihat-sabdakosh-nepali-dictionary/page/n11/mode/2up) |
|
|
| ## Dataset Structure |
|
|
| 53,119 rows, single `train` split, CSV format with 5 columns: |
|
|
| | Column | Description | |
| |---|---| |
| | `Word` | Raw surface form (e.g. `अँकाइनु`) | |
| | `Root` | The morphological root (e.g. `अँका`) | |
| | `Affix` | The affix, or `null` if the word has no segmentable affix | |
| | `Segmented` | `Root`+`Affix` joined with `+`, or equal to `Word` for unsegmented entries | |
| | `Source` | How the row was produced — one of `dictionary`, `heuristic`, `none` | |
|
|
| `Source` values: |
| - **`dictionary`** — root/affix pair taken directly from a dictionary entry |
| - **`heuristic`** — root/affix inferred by the rule engine from a related dictionary entry, not itself a dictionary headword |
| - **`none`** — the word has no affix; `Root` == `Word` == `Segmented` |
|
|
| ## Dataset Creation |
|
|
| ### Curation Rationale |
|
|
| Built to support morpheme-boundary prediction for Nepali, particularly |
| generalization to **out-of-vocabulary (OOV) roots** not seen during |
| training — see the companion fine-tuned model, |
| [`w4ashabii/Byt5_OOV_finetuned`](https://huggingface.co/w4ashabii/Byt5_OOV_finetuned). |
|
|
| ### Source Data |
|
|
| #### Data Collection and Processing |
|
|
| 1. The 10th edition of the Nepali dictionary was scraped for headwords and |
| their listed inflected/derived forms.(https://archive.org/details/nepali-brihat-sabdakosh-nepali-dictionary/page/n11/mode/2up) |
| 2. The scraped entries were parsed into `(Word, Root)` pairs. |
| 3. A heuristic rule engine extended coverage beyond literal dictionary |
| entries — inferring root/affix splits for related surface forms sharing |
| a dictionary-attested root (e.g. other inflections of a verb root that |
| itself appears in the dictionary). |
| 4. Each resulting row was tagged with its `Source` (`dictionary`, |
| `heuristic`, or `none` for unsegmented words) to keep the two processes |
| distinguishable downstream. |
|
|
| #### Who are the source data producers? |
|
|
| Nepali dictionary (10th edition) editors/lexicographers, via automated |
| scraping and heuristic parsing by the dataset curator. |
|
|
|
|
| ### Recommendations |
|
|
| If training a model for OOV generalization on this data, split by **Root** |
| (not by `Word`) to avoid leaking the same root across train/val/test via |
| different inflections of it. |
|
|
| ## Citation |
|
|
| If you use this dataset, please cite the Nepali dictionary, Sabdakosh 2075 10th edition, |
| as the underlying source, along with this repository. |
|
|
| **BibTeX:** |
| ```bibtex |
| @misc{root_affix_dictionary, |
| author = {w4ashabii}, |
| title = {Nepali Root-Affix Dictionary}, |
| year = {2026}, |
| publisher = {Hugging Face}, |
| howpublished = {\url{https://huggingface.co/datasets/w4ashabii/root_affix_dictionary}} |
| } |
| ``` |
