# wikibooks

Polish Wikibooks (open textbooks)

## Dataset description
- **Source (upstream):** https://pl.wikibooks.org/
- **Domain:** instructional
- **Language:** Polish (pl)
- **License:** `CC-BY-SA-3.0`
- **Created (range):** 2004-01-01, 2025-12-31
- **Added:** 2026-06-15

## Licensing — traceable basis
Wikibooks content is released under CC-BY-SA 3.0; attribution + share-alike preserved.

## Provenance
Fetched directly from the official Wikimedia dump (plwikibooks-latest-pages-articles) by src/fetch_wikimedia.py; mainspace only, wikitext stripped via mwparserfromhell.

## Statistics
| documents | characters | tokens (tiktoken proxy) |
|---:|---:|---:|
| 9,112 | 38,892,589 | 15,571,295 |

## Filters applied (build_dynaword.py)
Minimal, per Dynaword guidelines (heavy filtering left to downstream use):
- drop documents < 200 chars: **0**
- drop non-Polish (diacritic ratio): **539**
- exact cross-source dedup (sha1): **15**
- OCR alpha-ratio < 0.70 (OCR sources only): **0**
- read 9,666 → kept 9,112

Token counts are a fast tiktoken (cl100k) proxy (~1% off Llama-3); the canonical
Llama-3 count is computed at release.