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Add source: european_hplt_v3_pl (HPLT v3.0 Polish, top WDS bins, CC0)
### First dataset contribution — review requested 🙏
This is my **first dataset PR** to polish-dynaword. Please review carefully — happy to adjust
anything (thresholds, schema, naming, provenance wording).
**What:** `european_hplt_v3_pl` — filtered Polish subset of **HPLT v3.0** (`pol_Latn`), the two top
Web-Docs-Scorer quality bins (WDS = 10 + 9), **2 shards**.
| | documents | tokens (cl100k proxy) |
|---|---:|---:|
| bin-10 (`european_hplt_v3_pl.parquet`) | 55,590 | 261,468,813 |
| bin-9 (`european_hplt_v3_pl-part-b9.parquet`) | 55,000 | 250,914,965 |
| **total** | **110,590** | **512,383,778** |
**Why:** the v0.3 candidate config lists only HPLT **v1** (`european-hplt-v1`, ~1.98B PL tokens).
**HPLT v3.0** is a newer, much larger CC0 release (`pol_Latn` ≈ 270B raw tokens) with improved
extraction (Trafilatura 2.0), global dedup, and WDS quality bins. This contributes the cleaned top
bins; the same pipeline scales to bins 9→5.
**How it was made** (`src/clean_hplt_v3.py`, threshol…
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Release v0.3.1 Europeana preview shard (#4)
- Release v0.3.1 Europeana preview shard (8b262e000f9351affc65b6f21ff2b50671806f1c)
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Credit source expansion contributor
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Remove generated Python cache files
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Update v0.2.1 HF card release date
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Release v0.2.1 metadata schema update
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Add launcher for parallel HPLT filtering
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Shard and parallelize HPLT filtering
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Add progress logging to HPLT filtering
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Add European HPLT Polish web filtering workflow
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Add v0.3 source license review and quality mix workflow
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Add phrase frequency stats and HF card snippet for Polish DynaWord
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Squash: collapse LFS history to reclaim private storage
