| --- |
| license: cc-by-sa-4.0 |
| language: |
| - grc |
| task_categories: |
| - fill-mask |
| pretty_name: Ancient Greek Corpus (clean, LLM-repaired) |
| size_categories: |
| - 100M<n<1B |
| tags: |
| - ancient-greek |
| - ancient-greek-grc |
| - classical-philology |
| - masked-language-modeling |
| - ocr |
| configs: |
| - config_name: default |
| data_files: |
| - split: pristine |
| path: data/pristine/*.parquet |
| - split: repaired |
| path: data/repaired/*.parquet |
| --- |
| |
| # Ancient Greek Corpus — clean, LLM-repaired |
|
|
| A large, deduplicated Ancient Greek corpus assembled from open born-digital editions and public-domain |
| OCR, with the noisier OCR **repaired by Qwen3.6-27B**. ~**383 million words**. |
|
|
| ## Tiers (splits) |
|
|
| | split | records | ~words | what it is | |
| |---|---:|---:|---| |
| | `pristine` | 408,219 | ~90 M | already-clean text (spellchecker ≥99% clean), passed through untouched | |
| | `repaired` | 1,743,056 | ~290 M | noisier OCR (75–95% clean) reconstructed by an LLM editor: lines reflowed, split words rejoined, full polytonic accentuation restored, garbled passages dropped | |
|
|
| Total **2,151,275 records · ~380 M words**. A cleanliness floor (`clean ≥ 0.75`) was |
| applied so the noisiest OCR (which the LLM could not reliably repair) is excluded; the |
| per-record `clean` score lets you tighten the floor further if you wish. |
|
|
| ## Record schema |
|
|
| ```json |
| {"source": "greek_pd", "id": "...", "license": "Public domain", |
| "tier": "repaired", "orig_band": "p080", "clean": 0.83, "text": "..."} |
| ``` |
| `text` is NFC-normalised polytonic Greek. `clean` is the pre-repair spellchecker score; |
| `orig_band` is the original cleanliness band. |
|
|
| ## How the `repaired` tier was made |
|
|
| OCR bands (60–95% of words accepted by an Ancient Greek spellchecker) were shown to |
| **Qwen3.6-27B** with an editor prompt that: rejoins words split across lines, reflows |
| one-word-per-line text, restores correct breathings/accents/iota-subscript, fixes only |
| *certain* OCR letter confusions, expands nomina sacra, and **drops any clause it cannot |
| restore with confidence** (no fabrication — verified: output word-skeletons match the |
| source). Genuinely garbled input yields nothing rather than a guess. |
|
|
| ## Sources & licenses |
|
|
| Mixed-licence compilation (per-record `license` field); the compilation is offered under |
| **CC BY-SA 4.0**. |
|
|
| | source | upstream | licence | |
| |---|---|---| |
| | `ia` | archive.org `language:grc` OCR | Public domain | |
| | `greek_pd` | PleIAs Greek-PD (pre-1884 OCR) | Public domain | |
| | `pg` | Patrologia Graeca (calfa OCR) | CC BY 4.0 (Auwers, Vidal-Gorène, Kindt, Somers) | |
| | `catholic` | corpus_corporum OCR | Public domain | |
| | `gutenberg` | Project Gutenberg Greek | Public domain | |
| | `ddbdp`, `dclp` | papyri.info (DDbDP / DCLP) | CC BY 3.0 | |
| | `oga` | Opera Graeca Adnotata (Perseus + First1KGreek + PTA) | CC BY-SA 4.0 | |
| | `dbbe` | Database of Byzantine Book Epigrams | CC BY-SA 4.0 | |
| | `sblgnt` | SBL Greek New Testament | SBLGNT licence (attribution) | |
| |
| ## Usage |
| |
| ```python |
| from datasets import load_dataset |
| ds = load_dataset("Ericu950/AncientGreek") # splits: pristine, repaired |
| clean = load_dataset("Ericu950/AncientGreek", split="pristine") |
| # filter the repaired tier by pre-repair cleanliness: |
| rep = load_dataset("Ericu950/AncientGreek", split="repaired").filter(lambda r: r["clean"] >= 0.9) |
| ``` |
| |
